Recursivity in dictionnaries doesn't work

[njaros]

Hello there :)
I want to template a .rst file for any json structure using the jinja recursive feature

It works well for lists, but I'm stuck trying to make it works with dictionnaries

Here is my template to easily reproduce the bug :

{% for k, v in sample.items() recursive %}
  - {{ k }}

  {%- if v is string %}
    - {{ v }}

  {%- else %}

    {{ loop(v) }}
  
  {%- endif -%}

{%endfor%}

They're is a little Python script to provide a little dict structure :

    path = Path(__file__).parent

    env = Environment(
        loader=FileSystemLoader(path / "templates")
    )
    template = env.get_template("template1.rst")

    rendered = template.render(sample={"a": {"b": "c"}})
    with open(path.joinpath("source/sphinx_sample.rst"), "w") as io:
        io.write(rendered)

The execution of the script brings me the following error :

File "/home/jaja/Bureau/coding/bac_a_sable/sphinx_test/templates/template1.rst", line 5, in top-level template code
    {% for k, v in sample.items() recursive %}
    ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jaja/Bureau/coding/bac_a_sable/sphinx_test/templates/template1.rst", line 13, in template
    {{ loop(v) }}
^^^^^^^^^^^^^^^^^^
  File "/home/jaja/Bureau/coding/bac_a_sable/sphinx_test/templates/template1.rst", line 5, in template
    {% for k, v in sample.items() recursive %}
    ^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: not enough values to unpack (expected 2, got 1)

I expect to have a file containing the dict like:

• a
• b
• c

Environment:

• Python version: 3.11.2
• Jinja version: 3.1.4

[JamesParrott]

Jaja, recursivity with dictionaries works great. The bug is in your example template.

You just need to use loop(v.items()) instead of loop(v)

template1.rst

{% for k, v in sample.items() recursive %}
  - {{ k }}

  {%- if v is string %}
    - {{ v }}

  {%- else %}

    {{ loop(v.items()) }}
  
  {%- endif -%}

{%endfor%}

jinja2_recursive.py

from pathlib import Path
from jinja2 import Environment, FileSystemLoader

path = Path(__file__).parent

env = Environment(
    loader=FileSystemLoader(path)
)
template = env.get_template("template1.rst")

rendered = template.render(sample={"a": {"b": "c"}})
print(rendered)

>python jinja2_recursive.py

  - a


  - b
    - c

[JamesParrott]

Thanks David.

[njaros]

Thanks !
It helps me a lot, have a good day :)