Jinja2 if inside for loop. Jinja2 Template with Loop and Condition.

Jinja2 if inside for loop How to add two spaces after split? 1. Jinja2 nested loop counter. For example, this works fine, it outputs the name of each task responsible, it is the fix I'm currently using: 1. last %} , {% endif %} is a Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company JINJA2 has a limitation that prevents changing a global variable from inside an IF/ELSE statement of FOR loop. cycle Set a condition from inside of a loop Jinja2. How to add variables inside the for loop of Jinja python. 1. index0: The current iteration number (0-indexed). Jinja template for loop with if statement. Every node has a host_vars file containing name and description. In the following code I want to set the output string to print in a specific font color if the variable contains a string. A networking engineer attending the Building Network Automation JINJA2 has a limitation that prevents changing a global variable from inside an IF/ELSE statement of FOR loop. Follow edited Jan 3, 2023 at 13:22. js. nested for loops in jinja2 template. sorry should be data. value 100 times, but I figured I could try to find a way to loop through each struct within properties and It should return “Start, item 0, item 1, item 2, End” but it only returns “Start, End” so the expression in FOR loop is not executed properly. Is there a way to specify which loop we want to refer to? For Loop in Jinja2 with related variables. I'm not sure if it's needed because I can access the storage moved variable, but I'm not sure how to access the variables inside {{ hostvars[host]['storage_moved'] }}. Follow edited Jul 29, 2014 at 0:16. 0. 6. Just because I didn't see this part of the explanation anywhere, I figured I'd add it. So how to add for loop in this scenario so that sections are aligned automatically left and right. nextitem instead of the my_list[loop. 6 Nested For Loop in Jinja2. Operator to concatenate two dbt Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Ansible Jinja2 template conditionals in for loop. How to do that? Or is there another way to get the outer loop index? If you're willing to write a little Python, you can make it a clean one liner by writing a custom filter (this code has to run before you load any templates) or just adding all to your global Jinja2 environment:. Python: Multiple conditions for if statement in Jinja templates. After enabling, Jinja provides those two keywords which work exactly like in Python. Commented Nov 16, 2016 at 20:45. Viewed 560 times jinja2; Share. first is a way of keeping the initialization of N completely inside the loop. Related. index }} for the index and {{ loop. last: This is a special variable available inside Jinja for loops. Jinja python for loop syntax. – Kilrathy. 0 for loop String concatenation in jinja. How to Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company When we increment the counter in the inner loop, it seems to only be a local variable for the inner loop -- so it will increment while inside the loop, but then that local cnt is gone. Jinja provides a for loop very similar to the python for loop. How to add for loop value to div tag id in python flask? 2. A string is a sequence of characters in memory-- in other words, a string is data. length: The number of items in the sequence. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company For Jinja 2. zoo_id is defined %} server. This also applies to loops. You can also loop through different groups I want to know if its possible to loop through a list of macros in another macro in Jinja. index In this example, we define a Jinja2 template that iterates over a list of items. A networking engineer attending the Building Network Automation Solutions online course sent me a solution that included a pretty common (but somewhat suboptimal) way of iterating through a data structure that contains some elements you’re not I thought maybe the best thing would be to create a while loop for this and print everything out but since in Jinja2 there is no while loop I am a little bit confused how to do it. I have enabled my jinja2. Jinja2はDjangoのテンプレートエンジンより機能が豊富で、HTMLやXMLの記述専用のテンプレートエンジンではなくLaTexやメールといった他の用途にも使うことができます。 loopのcycleメソッドを使うと各引数に指定した各値をループ内で順番に繰り返す制御を The problem is first loop is working fine, but second loop not at all working. Environment global namespace itself if you see fit. Viewed 490 times 0 . Set a condition from inside of a loop Jinja2. – Set a condition from inside of a loop Jinja2. app. Jinja2 template if statement is not evaluating correctly. As for the rest, when programing rules become arbitrary - representational logic goes in the template, except for this representational logic - I tend to start ignoring the exceptions, especially if they make my life harder. One common scenario where comparison is used is varying command syntax based on the version, or vendor, of the installed OS. 6 default_hostname=server1 10. Use FOR-IF Construct in Jinja2 Loops. Consider Set a condition from inside of a loop Jinja2. It's easy to confuse strings and string literals, especially when using jinja to template SQL, since you need to consider the parsing context in both languages. 2024-12-13. index0: The current iteration of the loop. You can set up an array outside of a loop and push information from within the loop to it, e. (1 indexed) Jinja2 supports putting often used Basic Loop Syntax. asked by Taxellool on 03:10PM - 03 Mar 14 UTC. These macros can go into different templates and get imported from there. Jinja2 looping over list of dictionary items. length (in first loop) loop2 = loop. What happens to the loop variables when I break a loop? Please keep in mind that it is not possible to set variables inside a block and have them show up outside of it. BUT, I can only get this to work by passing a list I make in the view. How to build up a HTML table with a simple for loop in Jinja2? 0. Ask Question Asked 11 years, 7 months ago. Jinja append in I'm searching a way to do a loop inside of an inventory file (I don't even know if it's possible?) I explain myself: I have one var file in group_vars/All containing a list with ip address like: Jinja2 for loop over a list of objects doesnt give preferred output. ansible jinja2 - if elseif - use the same lines. 13. I am not able to understand this problem. You can check it with in tester. Here's an example that demonstrates the use of loop variables: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Comparing lists in DBT jinja macro inside for loop. For the iteration, unpack the two variables of the respective tuple. Load 7 As of Jinja v2. I want to include a chart which requires a Jinja for loop to accomplish population of the chart. for n in range(2, 10): for x in range(2, n): if n % x == 0: print n, 'equals', x, '*', n/x break else: # loop fell through without finding a factor print n, 'is a prime number' Inside of a for-loop block, you can access some special variables: Variable Description; loop. We are storing the string to a variable. However, the for loop is not returning the values I am fairly new to Jinja2 and I have an issue I can't seem to resolve no matter what I try. name. ansible conditional templates. I tried using {{ tables[0][0] }} inside the for loop but receive Jinja2 templates If condition not working correctly. Thanks you. j2 #jinja2: trim_blocks: False {% for x in range(3) %} Key{{ x }}: # The following should be one list - always here {%- if x % 2 %} - According to the documentation on for loops, you can access some special variables inside of a for loop like "loop. It evaluates to True only on the last iteration of the loop, and False otherwise. If you want to break out of the outer loop, use the break statement inside the inner loop. The problem I'm having right now is in a for loop in jinja2 template, there are white lines between each iteration which I would like to remove. index: The current iteration of the loop. Javascript inside Jinja "for" loop. How to sum variabiles in Jinja template. I have a website hosted in GAE and within my Jinja2 template I have an IF statement in a FOR statement. You need to move the loop to inside of the Jinja2 template instead of Ansible's with_items (which causes the /etc/ssh/sshd_config file to be overwritten in each subsequent iteration). For example, as per the output I posted, I would like to access cmd which is a variable inside the {{ hostvars[host]['storage_moved'] }} loop. index}} %} for data_dict in data: pass In my inner loop, I need to use the loop index in the outer loop, so I intend to set it to a variable as above. See the documentation on Block Nesting and Scope: "Blocks can be nested for more complex layouts. this is considered literally make the native jinja2 break that can added in any example of jinja2 not just specific case with check, no topic answer provided the way to make break statement for jinja2 they answer with code example to this question and if i used their code to make a break in jinja2 copy paste will not work as this answer is not Set a condition from inside of a loop Jinja2. My data set looks like: people: - forename: John name: Doe gender: M - forename: Jane name: Doe gender: F range in jinja2 inside a for loop. 168. 1 extendedKeyUsage = Is there a way to set a condition from inside of the loop I mean if 'for loop' doesnt have any result the ul tag dont generate into page. if statement in Ansible with Jinja2 variables. Modified 2 years ago. Conditional if. Commented Aug 27, 2023 at 17:56. Please keep in mind that it is not possible to set variables inside a block and have them show up outside of it. It works on an sequence/collection of values. The only exception to that rule are if statements which do not introduce a scope. 14. If neither of these loops contain any items, I want the page to redirect. {% for item in list %} {{ item }} {% Now let’s check inside the jinja2 configuration template used in automation script. The code works fine without the for loop in the template. Jinja if statement not execute properly. j2 template {% for item in my_var %} configuration_{{ item }}: value: - {{ loop. For Loop in Jinja2 with related variables. Loops. 0 Also, you seem to be trying to render a JSON inside a template. 264 Jinja2 template variable if None Object set a default value Loop Controls Import name: jinja2. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company im trying to use a for loop to add up some numbers for each day and i would like to access the variable outside the for loop im not sure how to go about this I am using the flask framework with python and just come from weppy where this was not a problem is there a way to make it work the same way in flask? Jinja image. Wonseok Setup Inventory. Alpine x-transition doesn't work inside jinja2 template for loop. Python code resultroute['checkpointlist'] = CheckPoint. We can also use control Inside of a for-loop block, you can access some special variables: Variable Description; loop. Overwrite an id of a parent element of a Jinja template. But before the first line and after the last line newline+indent are unwanted. I cannot seem to get it working at all when I am specifying a list of dictionaries for my YAML variable file. code) return You can't access a variable set inside a for loop outside of said loop. item }} for the value. How to break “for loop” in Django template. Combine them both, and you get 0 newlines. Using variable in default filter in Ansible Jinja2 template. But the syntax is invalid. path. revindex0: The number of iterations from the end of the loop (0 indexed) loop. Django sum values of from a for loop in template. 9,683 6 6 gold badges 60 60 Ideally you would be using different inventory files for production and staging, which would allow you to keep the same {{ inventory_hostname }} value, but target different machines. It does not have a way to prettify output, you have to manually make sure everything looks "nice". To properly understand this concept, Let Jinja2 supports nested blocks, including if statements and other control structures. Modified 1 year, 10 months ago. 0 Jinja2 for loop behaving similarly to with. Jinja2 Template with Loop and Condition. Hot Network Questions Normal ordering of passive Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company how to store for loop iteration output into variable as comma separated in jinja ? Expected output all_servers=test-vm-0,test-vm-1,test-vm-2,test-vm-3 {% set instanceCount = properties[" using variable from for loop inside an if statement. Viewed 3k times Jinja2 for loop in javascript on a list not working but accessing individual elements works. j2 with this content: The issue here with the for loop is that all the entries are with the same server ip (while I should have an entry for each of the servers with their respective hostnames): [IC] 10. import jinja2 env = jinja2. append(row. 479 Get lengths of a list in a jinja2 template. Iterate over the same list twice in Jinja2? 83. How to handle for/if loops from Jinja2 in Django Tempates. Modified 11 years, 7 months ago. 83. This extension adds support for break and continue in loops. Ask Question Asked 1 year, 11 months ago. all() to return a list of all the assessment_results objects. Christian Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I found that the scope of set statement could not be beyond the loop in jinja2 document Please keep in mind that it is not possible to set variables inside a block and have them show up outside of it. Jinja2 Template - for loop. If the loop flow isn't disturbed by statements such as break, it falls to the else block. How to avoid duplicate id references inside Jinja2 if-else statements. Sorry my fault, you're totaly right. update(zip=zip) # use env to load template(s) This may be helpful in separating view (template) logic from application logic, but it enables the reverse as well. I realize the ‘loop counting’ example may only be for demonstration purposes (to learn how to ‘get the value out of the loop I have an object (a QuerySet result from an ORM called tortoise-orm, but I think it doesn't matter) that behaves differently if I iterate it with a Jinja2's for loop. But I need to leave the name unchanged in the first iteration, this is necessary for backward compatibility in the production environment. Please, edit and try for How to Answer, describe the effect of what you propose and explain why it helps to solve the problem, make the additional insight more obvious which you contribute beyond existing answers, the relevant advantage which your solution achieves, especially if the difference is so small and non-obvious. 12 spaces added in front and at the end when passing jinja2 variable to HTML and I cannot remove it. Ask Question Asked 1 year, 10 months ago. Jinja2 range for loop - 2 variables in 1 loop. So, how do I modify a global variable in Jinja2 in for loop? ansible If the condition is met in the for loop, I'd like to change mybool to true so I can display mybool is true! below. apple banana I'm attempting to loop through a registered variable in a Jinja template via an Ansible playbook. This works similarly to the import statements in Python. trim_blocks = True app. But, even when changing hit inside the loop, it keeps the initial value outside the loop. jinja_env. Hellis81 (Hellis81) Jinja variables inside a loop are all local. Related questions. {% set names = [] %} {% for row in table %} {% do names. Example scenario (not working): In this code, we want to change the variable python, for-loop, jinja2. value_2 – Luisito. Nested 'If' statement in jinja 'for' loop. how can I have a for loop in a for loop like this? {% for stock in stocks%} &lt;tr&g Change the value of a variable inside a loop 264 Jinja2 template variable if None Object set a default value. Then, we can call it using {{ outer_loop() }}" - so you will probably have to employ a similar strategy here. In jinja2, variables go out of scope when moving outside of for loops, so I was trying to keep all things to do with variables inside the loopwell, inside the loop. When I place the How to set a variable inside for loop inside template in Django2. Hot Network Questions If I'm understanding your intent correctly, I think you have too much happening inside the Jinja2 for loop, i. lstrip_blocks = True If you want to keep a newline at the end of the file, set Thanks for @das-g's detailed comments. Commented Nov 16, 2016 at 20:47. Putting a -before the second percent sign on the first line of the for loop removes newlines before the added line. Looping over subset in Jinja. Consider the object tasks as an iterable object. Jinja complex if statement not I have tested this by calling l inside of the if loop and it does/doesn't fire based upon the correct amount of records. 2. Put your conditional inside the block instead, and use super() to instruct Jinja to use the original contents of the block as defined in the template: How to use a variable inside of if statement in jinja2? 91 'if' statement in jinja2 template. Nested For Loop in Jinja2. Modified 1 year, 11 months ago. After the loop completes, we want to print the variable. python jinja2: using variable in template with conditional. This is the Jinja2 template we’ll be using in this section, and it Jinja image. Inside the loop, we check if the current item is equal to ‘break’. Does Ansible Jinja2 Templating support list arguments in for loop?-1. HuBL / Twig: For loop Jinja Templates: Understanding loop. How to add variables inside the for If I understood you correctly, you don't need for loop for it. It looks mostly okay, although inside your innermost for loop you're not referencing either key_1 or value_2. Hot Network Questions Help Locate Bathroom Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Alex' comment looks good but I was still confused with using range. last %}, {% endif %} {% endfor %} In this example: {% if not loop. – Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Thanks, but it didn't work. 1? Ask Question Asked 5 years, 2 months ago. If we added another array, such as ae20, same would apply to that. Commented May 22, 2013 at 9:11 @Kilrathy So the problem is with "range"? Does this helps? I'm building a django template to duplicate images based on an argument passed from the view; the template then uses Jinja2 in a for loop to duplicate the image. ext. Looping in jinja. How to omit an empty line after a for loop in Jinja? 1. 8. 3. Hot Network Goal: {% for loop %} over a list (using Jinja2) and then print out results {{print}} in a HTML table using Bootstrap. I'm trying to get IP address from inventory using Jinja2 loop index inside hostvars (from Ansible): Inventory is like: all: hosts: host1: ansible_host: 192. These are pretty standard but I will show some examples nonetheless. I am using Flask do develop a web app to visualize data retrieved from a database. Below code syntax for using 'for loop' and 'if statements' in Python Language together with Jinja in HTML file: Jinja2 templates If condition not working correctly. Hot Network Questions Evolving to In Jinja you can then simply loop through the zipped items at the same time. You can use else blocks with loop statements. I only need to loop the index 1 - 6 since the index 0 in data is used somewhere else. (1 indexed) Jinja2 supports putting often used code into macros. Using loop. 126. Can I break a loop inside another loop in Jinja2? Yes, you can break nested loops. Presumably you are asking about Jinja2? – Daniel Roseman. 0. How to iterate through plain list in Jinja2 template and make an HTML table with Flask. e, code repeating that should not be repeating. FWIW, I’ve come across several examples of for-loops that can be replaced with filters. A string literal is a sequence of characters in code-- a string literal is not data until a parser reads it into memory as a string. (0 indexed) loop. {% set foo = False %} {% for item in items %} {% set foo = True %} {% if foo %} Ok(1)! {% endif %} {% endfor %} {% if foo %} Ok(2)! {% endif %} This renders: Ok(1)! I have a Jinja2 template page which contains two separate {% for %} loops. Improve this question. python, for-loop, jinja2. We are writing a for loop in Jinja2, which will keep on concatenating the list variable to a string until the end of the list. Jinja2 if/else matching both. Problem: List is not printing in the template. Inside this code I am trying to set the text color using css in a jinja2 template. Articles » Ansible-Related Content » Use FOR-IF Construct in Jinja2 Loops . 6 default_hostname=server2 I am trying to templatize a file. Here is my task: - name: Check if ports are open | inventory ports wait_for: host: &quot;{{ i Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I don’t see any issues there Sergei? interface variable in jinja2 template is set for every array under interfaces. How to trim last character when using ansible jinja loop. for loop String How to print spaces from inside a variable in jinja2. Modified 7 years, 10 months ago. 307 In Jinja2, how do you test if a variable is undefined? Related questions. Pushing items to a var while looping over another var in Ansible Jinja2 template. Until now i have only been able to append a static entry, but i would like to add a test depending on the current element. @Tsyvarev: The comment about iterating over indices instead of elements could be presented as an answer. Use Jinja2 template with ini host file. Add a comment | 0 . jinja conditional statements rendered in HTML page. Also, interface is just a word - I could have picked any other word such as From the Jinja2 template designer documentation: {% if variable is defined %} value of variable: {{ variable }} {% else %} variable is not defined {% endif %} Share. What I am looking for Modify the jinja2. 10, we can use loop. from jinja2 import Environment, PackageLoader, select_autoescape env = Environment( loader=PackageLoader('yourapplication', 'templates'), autoescape=select_autoescape(['html', 'xml']), line_statement_prefix='#' ) Jinja inside of Jinja double curly braces. For instan Use FOR-IF Construct in Jinja2 Loops. first_name) %} {% endfor %} multiple variables in same for loop (Jinja2, Yaml) 1. If you must adhere to use only jinja, you can utilize something like this: Nested For Loop in Jinja2. Putting a -after the first percent sign on the last line of the for loop removes newlines after the added line. 91 use if condition inside html tag using jinja tag. Do someone has an idea how to achieve that? So once again the goal is to print everything from the dictionary in the Jinja2 file. {% if instance['virtual_route_source'] and instance[' I want to append new key/value item to a hash inside a jinja2 for loop. HOW can we modify the global cnt??? As great as the Jinja2 doc may be, they are unclear about set variable scopes. Hot Network Questions UUID v7 Implementation If we have more than one level of loops, we can rebind the variable loop by writing {% set outer_loop = loop %} after the loop that we want to use recursively. For example: {% set macro_list = [macro_one,macro_two,macro_three] %} {% for Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I'm trying to build a model in DBT that flattens out a struct with name properties that contains about a hundred structs inside it (e. To create a loop in Jinja, you use the for statement inside a template. Host_Vars. The incremented value of count only lives within the scope of the loop. For example, the template below does what you're looking for. Using url module with jinja2 templates. Conditional if the variable exists and does not exist. Hot Network Questions A conjecture on quadratic residues Why did David measure Moab with a cord? You still need to output the loop variables inside braces. How to write jinja template for python code with nested for and ifs? 0. The broadest solution is to set trim_blocks and lstrip_blocks on the env. Jinja2 conditions not working correctly while iterating. I am trying to use a variable in a "if" statement, this variable is defined in a for loop, but I cannot get it to work, here is the code excerpt: First thing we look at is comparing values with conditionals, these make use of ==, !=, >, >=, <, <=operators. As a result the following Jinja2 printing for loop onto one line, separated by a character. How to remove trailing newline after loop in Jinja2 template. Given the following file. I am trying to create a config file for a device using a Jinja2 template and some variable files I have created. jinja : using variable from for loop inside an if statement. Ansible's template syntax is Jinja2, so you can use it right away. Use expression as filter argument in ansible. Example scenario (not working): In this code, we want to change the variable hasDiscount from inside the IF/ELSE statement, depending on whether the user has any vouchers in their vouchers list user attribute. Welcome to StackOverflow. Any idea or solutions to this? Any help will be much appreciated. type + ". Modified 6 years ago. 91 'if' statement in jinja2 template. Inside this code, I can get the two divs to toggle when showOriginal is toggled, but the animation simply doesn't work? In this case, summaries are sqlmodel objects rendered by Jinja2. Is there a way to set that the idx will be considered as a changing variable in a loop and not as a key. 1. index". 91 Jinja template for loop with if statement. Jinja if statments. Sounds like it should work. Django - display the same chart in loop in jinja template with chart. Ask Question Asked 2 years ago. – LGR. 10. In the view_config, I used query. html How to use nested if inside jinja2 filter. {% for item in items %} {{ item }} {% if not loop. globals. Worker contains 5 nodes and main contains 1 node. template: Jinja has multiple ways to control whitespace. asked Jan 3, 2023 at 12:38. Rather than just looking at the functional result produced by this code, try looking at the html source that is produced and start debugging from there. filter_by(route_id=route. Your original request to modify outer-scope variable inside a loop is solved only with jumping through some hoops, see How could I use the for loop inside the template instead of inside the python code to render the output? This is the code I have been working on. I want to add for loop in Jinja2 template, there is a condition I have 2 sections and their positions are left and right with different div (div for left section and div for right section ) as you can see in the image and code. 1 host2: Within a for loop, I'm iterating over a list of dictionaries, and if certain conditions are met, assigning a new variable with the value of a specific dictionary key. When the for loop is added to the template the output contains the same vlan information duplicated. To begin today's discussion on looping in jinja templating, let us first gain an understanding of what jinja really is all about. Viewed 4k times Since you're using the APP_DIRS convention in both the Jinja2 and . Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company How to use a variable inside of if statement in jinja2? 2. ansible template loop jinja2 "i need a line separated with , but the last entry without , 0. If such an item does not exist, the value is undefined. – larsks. jinja template adds extra line when if condition is not satisfied. condition template in ansible. The lines can not be formatted uniformly. Also, you need to access zoo_id for the target host using hostvars array. I could type properties. However, it will only break out of the inner loop if used inside an if condition. loopcontrols. jinja2 first x items in for if loop. 7. property1, property2, etc. g. 55. To properly understand this concept, Let me use an I am trying to iteratively concatenate a string to build url params with a 'for' loop, but I believe I am having scoping issues. shell> cat templates/template. On the other hand, Python doesn’t have the {for if} construct, maybe that’s one reason it has a break statement. . Commented May 22, 2013 at 9:03. looping through columns passed to an existing macro in DBT. Jinja2 multiple variables in same for loop. Viewed 1k times Jinja2 template (notice repetitive if statement and wondering if there is a way to combine it in one to get the desired output below) Depending on the condition, the text inside the respective block is rendered. " A good use case for this is writing macros that conditionally output HTML: Nested For Loop in Jinja2. My current code returns a crazy number of rows with no data. How to do this Code in Python to Jinja2 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company {% for data in data_list %} {% set data_index = {{loop. length (in second loop) if loop1 + loop2 == 0: redirect # (outside both loops) Is this even Q: "How to indent nested if/for statements in Jinja2?" A: Turn off default trimming and manually ltrim only indented control statements {%-. flask - jinja template forloop increasing loop index. I'm trying to do something like this (pseudo-code): loop1 = loop. Thank you in advance Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company For Loop in Jinja2 with related variables. I want a jinja loop inside of a jinja loop unfortunately I keep getting errors cause theres so many brackets. request import urlopen # open a url connection from urllib. Looping through the length of a list in jinja2. Using jinja if clause in ansible templated yaml (through template lookup ) 1. My inventory contains two groups: worker and main. jinja2 template: {% if extendedKeyUsage is defined and extendedKeyUsage %} subjectAltName = {% for SAN_IP in TLS_IP_SANS %}IP:{{ SAN_IP }}, {% endfor %}{% for SAN_DNS in TLS_DNS_SANS %}DNS:{{ SAN_DNS }}, {% endfor %}IP:127. On the other hand, Python doesn’t have Inside the loop, we can access the current element using the loop variable, which is defined as {{ loop. parse import unquote # decode special url characters @app. I know that the FOR loop is executing since other code within the loop is executed but not the combining of the strings. last: A boolean indicating whether this is the last iteration. Wonseok Choi. So the task: - name: Create custom file /etc/ssh/shhd_config for user configuration and restart sshd service template: src: sshconfig. query. :-) From the above hyperlinked changelog: Added previtem and nextitem to loop contexts, providing access to the previous/next item in the loop. I included a simple prime number finder below:. Issue creating a variable name I want to change the value of the variable declared outside the loop within a loop. – Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have code similar to the following in one of my jinja template {% for post in posts %} {% include ["posts/" + post. So effectively all variables under ae10 array would be mapped to interface. Not sure what I'm doing wrong with the for loop in the jinja2 template. Get the current and next value in a Jinja for loop. Looping over a list in a Jinja2 template. 9, the scope behavior was fixed, invalidating code that worked in previous versions. Now I have created this jinja2 inventory template file: test. j2 dest: /etc/ssh/sshd_config notify: restart ssh Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I would like to populate the same section of a Jinja2 for loop with data from 2 separate SQL queries using Python / Webapp2 / Jinja2. 126 How to increment a variable on a for loop in jinja template? How to add variables inside the for loop of Jinja python. Problem with Jinja code if condition in django web application. revindex: The number of iterations from the end of the loop (1 indexed) loop. Modified 5 years, 2 months ago. last: True if last iteration. Jinja2 for loop behaving similarly to with. Display only one value of jinja2 loop iteration. Like this: {{ "comes from a" if var in a }} {{ "comes from b" if var in b }} if var in a (or if var in b) check the existence of var in a (or b) arrays of values. Their example involves setting variables, but the concept is the same:. But when I write the second loop before first loop, then second loop work but then not first loop ( it going inside else and printing "No Product Found"). It's a form of expression so you can freely use it in the expression context. If it is, we use the {% break %} statement to break out of the loop. Set key,values for iteritem in for loop. Variable in Jinja - Flask. Apply if statement inside for loop in Python Jinja Templates. He explained how the space comes but didn't clarify how Jinja eats the white space. Scope of variable in jinja2 template. 285. 90 'if' statement in jinja2 template. Jinja uses familiar syntax to Python developers. Jinja2 if value less than zero. Either at the beginning of every loop or at the end it keeps the combination of newline+indent. jinja template variable assignment scope. They are returning I confirmed this via terminal/print debugging. The actual result is: - min and max have a constant value through all loop iterations - min=0 and max=5500. The output should be: url_param = "&query_param=hello& How to concatenate string and jinja expression INSIDE jinja statement Issue creating a variable name dynamically from jinja2 for loop. import re # regular expressions used to match strings from bs4 import BeautifulSoup # web scraping library from urllib. loopcontrols loop control using: template_dir = os. first: True if first iteration. dirname jinja : using variable from for loop inside an if statement. UPDATE. 18. Summing up values in jinja2. Ask Question Asked 7 years, 10 months ago. index}}={{server}}:2888:3888 {% It seems like Jinja is saying that idx is a key in the data record. Ask Question Asked 6 years ago. Well that would be the way to do it given that, in Jinja2, a variable’s scope within a for-loop is limited to the for-loop. I need to loop through a variable list and embed the &lt;debug nested for loop&gt; code in a jinja2 template. propertyX. 241. Jinja2 loop does not execute. Here is what the playbook looks like vars: env: - dev - prod - staging ta loop. variable, such as interface. How to make a for loop in Jinja? 1. I would like to add some comments here for me and for other people having the same issue. #separationofconcerns My template includes a for loop and that's where I've encountered some difficulty. Improve this answer. Ansible Jinja2 template conditionals in for loop. Hot Combine the two lists of images and titles one by one. length: The total number of items in the sequence. index] trick. Day. ), each with 5 different columns of which I want to extract one called value. How can I loop through 2 The default of Jinja's for loop does not help here, because it formats every line in the same way. In this case, you should refer to the Jinja2 for structure documentation and use the corresponding special variables available inside the loop. {{loop. html", "posts/default. previtem is also available. {% for server in groups[cluster] %} {% if hostvars[server]. loop. route('/') If you want to have several lines in the same template file, you should not loop in your task but in your template only. Environment() env. Hot Network Questions 80s/90s horror movie where a teenager was trying to get out of pink slime, but can't ansible template loop jinja2 "i need a line separated with , but the last entry without , 3. from jinja2 import Environment, PackageLoader, select_autoescape, last env = Environment( loader = PackageLoader('yourapplication', 'templates'), autoescape = Jinja2 for loop and complex conditions. How to increment a variable on a for loop in jinja template? 13. Jinja dynamically nested variables. Jinja / Django for loop range not working. It even has the range() function. I have a jinja2 template designed to print out the IP addresses of ec2 instances (tagged region: au) : {% for host in groups['tag_region_au'] %} My problem is I can't for the life of me work out how to include only hosts that exist in one group and NOT another (however each host may be in two or more groups), for example in python the following works: I am working on a flask + jinja2 website which involves plotting some stored markers on a map. The following worked for me while working on a for condition using length within range. Similarly loop. This is not a good approach. However, Access global variable inside Jinja2 include. Viewed 756 times How can I pass pure sql into a macro and then do the iteration in a dbt jinja2 macro. first: A boolean indicating whether this is the first iteration. last for Conditional Rendering .