CODEWITHSUNDEEP
htmlpython-3.xdjango
Manuel
Manuel

Reputation: 802

Using string parameter on django template

I'm having some trouble passing a string parameter to a href from withing a template.

I have the following url pattern

path('current_observations/<str:mongo_id>',
     views.specific_observation,
     name='specific_observation')

At current_observations I have several objects which have the mongo ID as an attribute. The idea is to send this id to the new url.

I tried doing the following without success

<a href="{% url 'VM_OrchestratorApp:specific_observation' resource.id|stringformat:s %}">
      {{ resource.TITLE }}
</a>

Which returns the error Failed to lookup for key [s]

Tried doing the following also

<a href="{% url 'VM_OrchestratorApp:specific_observation' resource.id|stringformat:'s' %}">
      {{ resource.TITLE }}
</a>

But in this case the argument is not being recognized at all.

NOTE: By doing

<a href="{% url 'VM_OrchestratorApp:specific_observation' 'hello' %}">
      {{ resource.TITLE }}
</a>

I get redirected to current_observations/hello which is the expected behavior.

Any idea on what could be going wrong with the string formatting?

EDIT:

Based on @Ralf answer, I tried doing the following.

<a href="{% url 'VM_OrchestratorApp:specific_observation' resource.id %}">
      {{ resource.TITLE }}
</a>

This returns the following error.

Reverse for 'specific_observation' with arguments '('Some_id',)' not found. 1 pattern(s) tried: ['current_observations/(?P<mongo_id>[^/]+)$']

It seems like a second empty argument is being added when calling the specific_observation url.

Upvotes: 0

Views: 147

Answers (1)

Ralf
Ralf

Reputation: 16515

Have you tried just using resource.id without the template filter stringformat?

The url template filter docs show an example of letting the filter handle the conversion to string (code example {% url 'app-views-client' client.id %}, located a few paragraphs into the description of this filter).

The code would look like this:

<a href="{% url 'VM_OrchestratorApp:specific_observation' resource.id %}">
    {{ resource.TITLE }}
</a>

Upvotes: 1

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