Opened 11 years ago

Last modified 5 years ago

#12096 new New feature

Model fields are not accessible as attributes of the model class

Reported by: sejo Owned by:
Component: Database layer (models, ORM) Version: 1.1
Severity: Normal Keywords: model, docstrings, attributes
Cc: Triage Stage: Accepted
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


When using attribute docstrings in my models they will never be picked up by doctools as the attributes disappear top level from the model.
This makes me to keep separate documentation and code for djagios.

Change History (10)

comment:1 Changed 11 years ago by sejo

comment:2 Changed 11 years ago by Jacob

Owner: changed from nobody to Jacob
Status: newassigned

comment:3 Changed 11 years ago by Jacob

Triage Stage: UnreviewedAccepted

comment:4 Changed 11 years ago by Jacob

This is actually because ModelClass.field raises AttributeError from the descriptor. I've been wanting to stop that, anyway -- it ought to just return the Field object.

comment:5 Changed 10 years ago by Julien Phalip

Severity: Normal
Type: Bug

comment:6 Changed 9 years ago by Aymeric Augustin

UI/UX: unset

Change UI/UX from NULL to False.

comment:7 Changed 9 years ago by Aymeric Augustin

Easy pickings: unset

Change Easy pickings from NULL to False.

comment:8 Changed 8 years ago by Aymeric Augustin

Component: Core (Other)Database layer (models, ORM)

comment:9 Changed 5 years ago by Tim Graham

Owner: Jacob deleted
Status: assignednew
Summary: model attributes are not set toplevel which causes doctools to miss the attribute docstringsModel fields are not accessible as attributes of the model class
Type: BugNew feature

I'm not sure what the implementation should look like. It seems that Jacob's comment about "ModelClass.field raises AttributeError is obsolete.

comment:10 Changed 5 years ago by Sylvain Fankhauser

To get this to work we need to change some low-level stuff since model fields are stripped out by the metaclass to be put in Model._meta. Since Sphinx's autodoc module allows to manually add members to a class I think it would be better to do in manually than trying to change the way Django models are constructed.

Anyway, I came up with the following code that makes Sphinx's autodoc work for Django models. It is very hackish and unsurprisingly makes some tests fail, so I'm just putting this here for the record in case anyone would want to take that over someday.

class ModelBase(type):
    def __getattr__(self, attr):
        if attr == '_meta':
            raise AttributeError(attr)

            return self._meta.get_field(attr)
        except FieldDoesNotExist:
            raise AttributeError(attr)

    def __dict__(self):
            model_dict = {
       f for f in self._meta.get_fields()
        except AppRegistryNotReady:
            model_dict = {}

        model_dict.update(super(ModelBase, self).__dict__)
        return model_dict

    # Rest of ModelBase code...
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