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Working Jinja2 url_for with test #1004

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@dave42w dave42w commented Oct 28, 2024

Description

This PR starts the process of implementing url_for so that Jinja templates can reference Robyn endpoints by function name rather than path see #996

Summary

[Updated] This PR adds a url_for that returns a fixed string and a test for this.
3rd Nov 24 Now looks up functions via the Robyn object router
7th Nov. All finished.

Changes are limited to 7 files (5 of them related to testing)

  • templating.py (define the url_for function and add it to the global Jinja environment using generic add_function_to_globals())
  • base_routes.py (call the set_robyn method of the JinjaTemplate)
  • template.html (display test output of url_for with the sync_auth function
  • test_get_requests.py (add an assert to check for /sync_auth in an href)
  • test_get_function_url (unit tests)
  • test_get_param_filled_url (unit tests)

TODO handle positional and named arguments
TODO add set_robyn and url_for to template_interface
TODO warn if no Robyn object set using set_robyn
TODO improve response to an invalid route
TODO rename from url_for to get_function_url in preparation for adding get_static_url
TODO remove @pytest.mark.url_for from test_get_requests.py`
jinja_template = JinjaTemplate(".", "utf-8") #solves my git locale pre-commit issue
TODO add unit tests
TODO add unit tests that cover combinations of url's
TODO documentation

PR Checklist

Please ensure that:

  • [X ] The PR contains a descriptive title
  • [ X] The PR contains a descriptive summary of the changes
  • [ X] You build and test your changes before submitting a PR.
  • You have added relevant documentation (I've added a docstring, until we get to the point where it can be used in a functional way I've not added it to the main documentation)
  • [ X] You have added relevant tests. We prefer integration tests wherever possible

Pre-Commit Instructions:

  • Ensure that you have run the pre-commit hooks on your PR.
    I think I've done that. I'm running the tests from a separate clone which I have had to modify to work with Python 3.12.7

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codspeed-hq bot commented Oct 28, 2024

CodSpeed Performance Report

Merging #1004 will not alter performance

Comparing dave42w:url_for (d0d8e7b) with main (abb42d0)

Summary

✅ 146 untouched benchmarks

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dave42w commented Nov 1, 2024

I'm stuck. See #996 (comment)

@dave42w dave42w changed the title Initial static text url_for implementation Working Jinja2 url_for with tests Nov 3, 2024
@dave42w dave42w changed the title Working Jinja2 url_for with tests Working Jinja2 url_for with test Nov 3, 2024
…n. ruff fixes. Safety check for no robyn object.
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dave42w commented Nov 6, 2024

Hi @sansyrox

I've just added the support for URL parameters. All committed with tests.

So from my previous comment today b) is done. Feedback on a) c) and d) appreciated.

Thanks

Dave

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dave42w commented Nov 7, 2024

Hi @sansyrox

I've sorted out the pyproject.toml problem (a) :-)

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dave42w commented Nov 10, 2024

Hey @dave42w 👋

Is it up for review??

Hi,

Wondering if you are able to do that review or if there is more I need to do.

Thanks

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Hey @dave42w 👋

Apologies for the super late review. My work has been mental. I will try to complete my review by tonight or tomorrow for sure 😄

Comment on lines +39 to +40
@abstractmethod
def get_function_url(self, function_name: str, route_type: str = "GET", **kwargs) -> str: ...
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@dave42w , should it be a part of the ABC ?

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I put it in the ABC because I assume that if you switched from Jinja2 to a different templating engine you would still want to be able to call this function so you can have less brittle templates (ones that change if you change a subrouter prefix or the route for a function.

Comment on lines +55 to +61
def set_robyn(self, robyn: Robyn) -> None:
"""
The get_function_url needs to have access to the list of routes stored in the apps Robyn object

Args:
robyn (Robyn): The top instance of the Robyn class for this app.
"""
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I am sorry if I am being a bit daft but why is this function needed?

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@dave42w dave42w Nov 12, 2024

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When we are rendering a template that includes a call into the TemplateInterface get_function_url(...) that function needs to get the live and complete list of routes. That means we can't have the TemplateInterface keep a copy of the routes that existed when it was created. Instead, when the call is made we check the live list of routes. The only place I could see that we can get that live list of routes from is the main app Robyn instance.

I couldn't see a way to get hold of the Robyn instance automagically. So it was either a set method or the constructor.

I decided to go for a set method as the constructor for JiujaTemplate already has 3 arguments plus self (I figured it will impact the existing code less and be easier to add additions templating packages)

If projects don't use get_function_url(...) then they don't need to call set_robyn.

Long term I want to find a way to get to the routes via a router singleton and to have the router do the work to return the URL. But I don't think we have that possibility yet. And it won't change the templates (only thing would be that set_robyn would not be needed but we can make it do nothing and depreciate it over a couple of releases)

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dave42w commented Nov 12, 2024

@sansyrox
I haven't marked the 2 conversations as resolved as I figured you need to be happy with my responses first. Is that the right approach?

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dave42w commented Nov 16, 2024

Hi @sansyrox
I think this is ready, just need to confirm that you are happy with my responses.

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dave42w commented Nov 20, 2024

Hi @sansyrox I wanted to check if you are happy for the conversations to be marked as resolved?

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dave42w commented Nov 24, 2024

Hi, @sansyrox

I think the test failures are CI timeouts, this has passed all the tests at some point since the last change.

Can we merge?

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