Jinja join list to string Here's my sample code: The above code snippet sets a variable my_list to a list of strings. It's more declarative and feels a little less hacky. 2. Or combine the Python syntax and Jinja filters to return the first letter of the full name in upper case: Use the following Jinja syntax to replace or modify text. Btw, in my case I've got integers as strings coming from JSON content files: "hero_title_img_w": "111" and "hero_title_img2_w": "222". Considering use cases where additional filter needs to be applied, concatenating inside a Jinja expression might be prefered. 2025-03-16. Connect and share knowledge within a single location that is structured and easy to search. See similar questions with Joining list results for output: Using the above example data, there are multiple ways to work with the members of this list. Ask Question Jinja convert string to integer. Improving Readability They help make your templates more readable by separating different parts of a string, especially when dealing with complex constructions. com customers: - name: Note. I am not sure if that is what you need. It may be necessary to join or group fields, for example, you might wish to group all assets belonging to a user. Although I found I preferred surrounding the whole expression with {{ }} instead of the individual elements. Modified 7 months ago. For example: {{listx|join(', ')}} will join a list with commas (str. combinations. 1. Viewed 14k times 1 . For example, you can use the join filter to concatenate the elements of the list back into a string. If it were a string, the returned list would be a list of characters. Please see the code below: playbook -->--- - hosts: localhost vars: input: [ "a", "b", "c" ] tasks: - name: debug set_fact: output The below template can be used in a workflow block to group or join items in a list. Separator is the argument we supplied in parenthesis and we could use different one depending on our needs. Join dictionary lists with custom jinja filter plugin The Ansible Guy November 01, 2021. Combining lists. How do I map list of strings into a list of objects in Ansible/Jinja2? 1. Let's say you are using the vars plugin to create an list of fruit. split(). doors) that have attribute battery_level. How to join with equal sign and add single quote to the integer in Jinja2. Ansible runs all strings through jinja and then tries to load the result as yaml. ~ The ~ (read as "tilde") operator is used to join operands as strings. From list ['host1', 'host2', There isn't any way to do this using strict Jinja. dumps(value)) I need to dynamically set a new list type variable list var. Combining items from multiple lists: zip and zip_longest. How to concatenate string and jinja expression INSIDE jinja statement. You have to use the join method to concatenate strings and variables. The resulting output will be: apple, banana, orange Using a loop. So if it could be possible to install it in mkdocs I would prefer use something like in the commented link than using namespaces and then split strings back to a list: {% How to join with equal sign and add single quote to the integer in Jinja2. Example: Implementation. Split a string into a list in Jinja. x) You could also use + if both parts are already strings, Reference: jinja Applies a filter on a sequence of objects or looks up an attribute. I want to build an array of entities with battery_level < min_battery level and display as a string separated by commas. append(’ WHERE ‘) }} {% for check_date in check_date_list %} The point is also that it seems to be possible with lists but in a weird manner, unless installing the mentioned extension. The idea being: fetch the values from the database that you want to have included in your SELECT query However, this approach can lead to issues in certain scenarios. Ansible, or jinja, has a few builtin filters to work with 2 lists, like intersect and difference and union, but they are all to work with simple lists. The below template can be used in a Use list comprehension and join function to achieve this. I haven't found this function in the official documentation, but it works similar to normal Python. The index of an item indicates the position the item has in the list, beginning from 0. Split string into individual charactor array in jinja2. Learn more about Teams Inserting Jinja variable into a quoted string. I can't figure out what's wrong with my syntax. All that is returned to Connect and share knowledge within a single location that is structured and easy to search. Jinja2 filter list using string contains test. If you're using Jinja from Python, the easiest solution is I am having issues concatenating strings in Salt, I want to grab a salt grain called &quot;accesslist&quot; which holds an array of groups to append to an access list. Enumerate a list in jinja that satisfies a certain condition - with commas in between each item except for the last value printed 0 How to convert list from python into comma separated values in python with jinja or javascript Connect and share knowledge within a single location that is structured and easy to search. join(mytext. But you can convert a list to a string using. Let's write such a Now we need to convert this to a single string with comma separated (or separated by any other character). replace('LX', 'XX')}} *Replaces one string with another {{barcode. Another approach to generating a comma-delimited list in Jinja templates is by using a loop. Here’s the problem I faced: I’m trying to create a sensor with a list of links, parsed via IMTP i Hi! Since one of the latest updates templates can now render lists. split()), but it will be a double hack. I have a group of entities (states. 'America/New_York') There is a corresponding action in the 'transforms' pack that uses this filter - I have a 2 list: a = ['user','user2','user','user2'] b = ['value1','value1','value2','value1'] Is it possible to merge both and add "_" in between them This is by no means pretty, but this worked for me. group. I know I can use the join(', ') filter to separate lists, but where the entry is a single list item, it will separate every character of the string, which is not what I want. things %} {% endfor %} {{ item }} {% endfor %} ` I run this with the below playbook: ` To work with data in Jinja conveniently, you can use filters. Combining hashes/dictionaries. I know this is a long time coming, but I think that there is a good answer that hasn't been brought up yet. Add quotes around each string in a list in jinja2? 0. Improve this answer. but for this specific example I would take a look at using jinja's join filter. If a string is passed, it will be parsed into a datetime timezone: The timezone to convert the datetime to. Jinja For Loop that returns list item as a single-quoted output and a non-quoted output. Improve this question. This method succinctly combines list elements with a specified delimiter. Troon (Troon) February 21, 2023, 8:51am 2. In example like {{ (prefix ~ '-' ~ suffix) | upper }} {{ '-'. But, there is no filter in Ansible to transform a list of two items into a dictionary, AFAIK. However the list workflow seems to be pretty limited. lower(s): Converts a value to lowercase. It's very strange at the beginning, but very useful after this. I am building a Podman container that runs Samba Active Directory with Bind9 and Freeradius Good stuff. This list has to be placed on a line with commas between the users. So any valid yaml in a string is loaded as a data structure -- so if you template valid yaml it will get loaded as data. cfg: jinja2_extensions = jinja2 You provide a list of strings or any iterable data as input to the filter. The template would look something like this: It’s a challenge for jinja-ninja. Ansible / jinja’s syntax can be mind boggling at times and this was a real help. I took inspiration from this answer on a related question and realized that you can call set multiple times for the same variable and seemingly not incur any penalty. I have a variable files like below: things: \ To convert a string into a list using Jinja, you can use the split filter. example. I found users are using loops and adding to a string value but there is a simple way to do this as shown below. Randomizing data. Proper way to concatenate variable strings Confirmed to work on nunjucks (which is based on jinja) on (email) HTML builds. The List of Builtin Filters below describes all the builtin filters. It converts neighboring operands into strings and concatenates them. Custom plugin and filter combine in map. Combining objects and subelements. Follow How to combine json dictionary and lists in jinja template. Share. Additionally, list converts from generator to list. - name: Concatenate a list to string set_fact: my_string: "{{ my_list | join(',') }}" Find the full playbook below. This is because jinja only outputs strings so that allows it to load a data structure from a variable if there is one. PS 2: Since we use a Python-expression, you can infact manipulate the strings during the join Connect and share knowledge within a single location that is structured and easy to search. The split filter takes a string and splits it into a list based on a specified delimiter. {% set access_filter = '( See How to iterate through a list of dictionaries in Jinja template? Share. Probably the easiest way to do this would be with a quick template filter: @register. name %} {% endfor %} {{ output }} At the end my output var is still empty. So I'm looking for a way to optimize it somehow. 3. You could use that to build up your function args, including the single quotes: {% endmacro %} And then use the join filter to concatenate the items of a list: {% set args = [i[0], i[1], quoted(i[2 I have a task which uses with_subelements but it's terrible slow for big list (especially that most of the elements has duplicates and I don't need to run it multiple times for them). I didn't like any of the answers, they feel too hacky (having to worry about outputting None, or spurious whitespace using other techniques), but I think I've found a solution that works well. To concatenate our 3 vars, and get a sha512 hash: join is a Jinja2 filter that can be used to convert a list into a string. join(', ', listx)). Jinja2 - Create python list containing objects from a prefixed list. Jinja2 - split string. (in JSON, any string should be quoted, and "just a Conditionally join a list of strings in Jinja. This will add a space between each element. Jinja2 is treating list of dictionary as string. So really what I cared about wasn't string vs list, but single item vs multiple items. 4. dt: The inputted datetime object. Note. Conditionally concat jinja2 lists. Enumerate a list in jinja that satisfies a certain condition - with commas in between When setting out strings, you have to tell the renderer that it is a value of type string, not statements of Jinja. This can be a timezone name from the IANA db (e. This will double quote every string of the list: list_of_string | map("to_json") The problem with the "quote" filter is that it does not quote elements that dont need to be quoted from a bash perspective (no space in the string). inventory: I'm trying to concatenate strings in a state, and I'm not having much luck. list(value): Converts the value into a list. How to remove brackets from Jinja list variable (DBT) 2. Purpose. 2. I've seen the posts that suggest using (|join), but all my strings are not in a single dictionary. { value|join(', ') }}. So you can update a list but not a string Again coding not the best but the hack works {% set look_back_days=7 %} {% set check_date_list=[‘created_date’,‘updated_date’ ] %} {%- set where_array = -%} {{ where_array. It is not possible with the core format filter. test. How to pass variable into a string? Jinja2. I tried like {{my_macro(my_input_var)|join(’ and \\n ')}} but it only prints “\\n” What works actually is: {{my_macro(my_input_var)|join(’ and ')}} However that does not look very nice and I was wondering if there is not a special command/character I could use? Thanks Chris Lists are also indexed, meaning that every item that is stored in a list, has a special number called an index through which you can access the item. map(): Applies a filter on a sequence of objects or looks up an attribute. Here's my code: Return a string representation of a datetime in a particular format. That's how to convert numeric string values to integers. One of the most efficient ways to create a comma-delimited list is by utilizing Jinja’s built-in join filter. The result of join is always a string, but the object to be joined can be of many types (generators, list, tuples, etc). To decode a Jinja response to a string, we primarily need to ensure that the template has been rendered and then convert it properly. That said, there is clever functionality that lets you query a database before jinja starts to put the string together. Documentation for the Home Assistant Script Syntax. I found out that is because of scope problems in jinja2. Learn more about Teams Remove outside double quotes from list of jinja strings. In my setup, I'd like for a value to either be a string or list of strings coming into the Jinja template. Decoding Jinja Response. an example of the dict is below. filter def to_json(value): return mark_safe(simplejson. How can I tell Jinja2 to only use the filter if it is processing a list? You need to convert the fav_colors list back to JSON. You can use join for this. bar dans Jinja effectue les opérations suivantes sur la couche Python : recherchez un attribut appelé bar sur foo ( getattr(foo, 'bar')); si ce n'est pas le cas, recherchez un article 'bar' dans foo ( foo. String concatenation in Jinja. Follow I am getting back a list of events from a 3rd party. Follow edited Jun 15, 2017 at 14:16. Imagine you have a list of users but you are only interested in a list of usernames: Users on this page: {{ users|map(attribute='username')|join map(“join”)|list apply join function to each pair, producing a string “{p}{element}” (it is applied to each pair from step 2). How to remove brackets from Jinja list variable (DBT) 1. And join(' ') is a Jinja2 filter that concatenates a list into string. Solution 1: Using Jinja’s Built-in join Filter. The items can be called via an index, used in a loop or, like Dave suggested, if you know the values, it can set variables like a tuple. Taylor D. Jinja provides various filters and functions that can be used to further manipulate the resulting list. However, when I use the join() filter, it works on the inner list, the characters in the strings, and not on the outer list, the strings themselves. Conditional substring in a Jinja2 template. Is this possible with Twig and, if so, what is the proper syntax for concatenating multiple variables and strings? Thanks! variable; Share. Here is an example of how to do that. 50. This is useful when dealing with lists of objects but you are really only interested in a certain value of it. . Filters are functions that are applied to your data in a specific way: Take your data and return it modified. Jinja2 join only for lists. Ask Question Asked 3 years, 2 months ago. strip('LX Since strings are lists of characters in Python, we can concatenate strings the same way we concatenate lists (with the + sign): {{ var1 + '-' + var2 + '-' + var3 }} If you want to pipe the resulting string to some filter, make sure you enclose the bits in parentheses: e. If you're using Jinja 2. Edmiston Taylor D Big thing to remember is that the main thing that dbt-jinja does is create a string of SQL. Here's a basic playbook example: vars: app_instances: - host_name: host1-domain inst_count: 3 - host_name: host2- Connect and share knowledge within a single location that is structured and easy to search. The debug module can be used to output the entire list, like this. join(my_list) }} Output "apple - banana - cherry" You can customize the joiner to use any character or string you desire. Remove outside double quotes from list of jinja strings. List comprehensions in Jinja. Instead, let’s explore effective solutions. yml playbook:--- - name: product and map filters demo hosts: localhost gather_facts: false vars: domain_names: - app1. --- - hosts: localhost gather_facts: false vars: fruit: - apple - banana - orange - grapes tasks: - name: debug fruit debug: var: fruit I'm using Home Assistant templates, which run on Jinja2 script. I want to join all the dictionaries values, which are strings, into one string I'm not quite sure of the syntax in Jinja2 for this. products. Script Syntax. Tests¶ {% set my_list = ['apple', 'banana', 'cherry'] %} {{ " - ". In this case your friends are: the map filter to extract the name attribute as a list from your customers variable; the product filter to mix-up your two lists; e. com - app2. This filter plugin is part of ansible-core and included in all Ansible installations. 0. It's very useful for beginners to know why join is a string method. 8+, use equalto instead of sameas as @Dougal commented; sameas The easiest way to generate a comma-delimited list in Jinja templates is by using the join filter. The method you choose will likely depend on more complex situations where one style more sense to use over Filters that accept arguments have parentheses around the arguments, just like a function call. join((prefix, suffix)) | lower}} Credits To. Given your list of lists, you should be able to use the sum filter on your list. I wish to get all unique elements from that list - let say settings in the example below:. Selecting values from arrays or hashtables. But if you are willing to write a few lines of python, you can easily solve this with a custom filter. Given the following example list and Jinja template: List: list: - foo - bar Jinja template: {% for key in list %} results: - "{{ key }}" {% endfor %} I am able to produce the following output: results: - foo results: - bar How can I instead append a line, for each item in the list, to the template to produce this result? I have a list of hostnames and want to add protocol and port to every one of them, then join the new string together. It’s basically a concatenation of strings that itself should be interpreted as an object name. join(' ') you get error, because there is no join method for lists in Python. 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 have a variable files like below: ` layers: name: APP things: cactus lotus jasmine rose bgcolor: sky blue name: WAS things: mango apple bgcolor: yellow ` Below is my jinja template file: ` {% for layer in layers %} {% for item in layer. The basic usage is mapping on an attribute. Here is my code {% set output = '' %} {%- for item in items -%} {% output = output + item. But for windows commands sometimes strings must be quoted anyway. Dynamic List Creation You can use variables and expressions within the list() function to create dynamic lists based on the data available in your context. ~ is the string concatenation operator in jinja. split for easy linking to the plugin documentation and to avoid conflicting with other collections that may have the same filter I'm working on a backend flask/jinja2 app and I know how to join a list of strings; however, I need to join a list of dictionaries. The filter product seems a good candidate to start with the transformation of a simple list into a list of hashes. Jinja variables in function. Par souci de commodité, foo. if try to concatenate some strings in a for loop, what i found out so far is that it is not that easy with jinja2. However, we recommend you use the Fully Qualified Collection Name (FQCN) ansible. For instance, consider the following list {% set myList = ['a', 'b', 'c', 'x', 'k'] %}. But there is a workaround with {% do Connect and share knowledge within a single location that is structured and easy to search. Random MAC addresses. The letter a is the Converts all operands into strings and concatenates them. This is useful when dealing with lists of objects, but you are only interested in a certain value of it. combine for easy linking to the plugin documentation and to avoid conflicting with other collections that may . 35. I am trying to iteratively concatenate a string to build url params with a 'for' loop, but I believe I am having scoping issues. builtin. There is join method for string in Python and you can call ' '. Partial String on Jinja2 String Variable to EntryField. enable do jinja extension in ansible. {% set my_string = "Hello, For example, consider a list of fruits: fruits = ["apple", "banana", "cherry"] Within your Jinja template, you can use the join filter like this: My fruits are: {{ fruits | join(', ') }} This will output How can I join list items conditionally? Use reject filter with sameas test: UPDATE. Template Designer Documentation — Jinja Documentation (3. Let’s go through this step by step. g. The join filter takes an iterable and concatenates its elements into a single string, with a Join or group fields. We then use the join filter to concatenate the elements of the list into a comma-delimited string. Simply use the right tools :). Is there a way to write a Jinja set nested within a Jinja for loop. Home Assistant. Random items or numbers. __getitem__('bar')); si ce n'est pas le cas, renvoie un objet non défini. Learn more about Teams How to concatenate int with str type in Jinja2 template? Ask Question Asked 7 years How to concatenate string and jinja expression INSIDE jinja statement. 17. Hot Network Questions Concatenating Strings Effectively in Jinja Templates . Converting a string into a list using Jinja in Python 3 However, sometimes you may need to decode the response from a Jinja template into a straightforward string, such as for logging or further manipulation. In most cases, you can use the short plugin name combine. A string variable can be split into a list by using the split function (it can contain similar values, set is for the assignment). answered Jun 15, 2017 at 14:10. Jinja2/Python - Strings to Integers for comparison I am using an array to output a list of items and would like to split them with ’ and ’ & line-break. In most cases, you can use the short plugin name split. [{key:'value'},{key:'secondValue'}] I have a Jinja2 template that takes lists or strings. I got working with an array by looking at other Jinja macros. You specify a separator (optional) to be inserted between each item in the joined string Within your Jinja template, you can use the join filter like this: My fruits are: {{ fruits | join(', ') }} This will output the following: My fruits are: apple, banana, cherry Connect and share knowledge within a single location that is structured and easy to search. The usual pythonic way of doing it works perfectly fine if the items in the list are strings: Find the answer to your question by asking. Concatenate optional variables in Jinja without duplicating whitespace. permutations. ; Creating Dynamic Strings Joiners are essential for building dynamic strings that might include variables, loops, or conditional Filter join took list stored in name_servers and created a string by gluing together elements of the list with space as a separator. Compatibility The list() function in Jinja seamlessly integrates with Python's list functionality, making it easy to work with lists within your templates. By calling mytext. I went to the simplest for demo, you would probably have to harden the code and fix edge cases for a real life use. You have a list, and you want to rewrite it in a single line, each element in quotes, joined by coma. Selecting JSON data: JSON queries. Typecast int variables to strings in Jython for use in Sikuli. {{barcode. Shuffling a list In Ansible, I have a list of strings that I want to join with newline characters to create a string, that when written to a file, becomes a series of lines. Learn more about Teams casting ints to str in Jinja2. I needed to build a list of usernames with a "!" in front of each one. odipwp xwuz xhyyl aslhct mop nuqz qml jpmikw yupnmhgc oetctrc rwlb nfmh rfaasd raocy ymrrirm