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OPTIONS fetches and shows all possible foreign keys in choices field #3751

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@mlissner

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@mlissner

I have an object with foreign keys and when I load a OPTIONS request for that object type, it shows me a truly insane JSON object with every possible value for the foreign key (there are millions!)

So, for example, I have this object:

class OpinionCluster(models.Model):
    """A class representing a cluster of court opinions."""
    docket = models.ForeignKey(
        Docket,
        help_text="The docket that the opinion cluster is a part of",
        related_name="clusters",
    )

Which is serialized with:

class OpinionClusterSerializer(serializers.HyperlinkedModelSerializer):
    docket = serializers.HyperlinkedRelatedField(
        many=False,
        view_name='docket-detail',
        queryset=Docket.objects.all(),
        style={'base_template': 'input.html'},
    )

When I load this with OPTIONS, I get back something that contains:

    "docket": {
        "type": "field",
         "required": true,
         "read_only": false,
         "label": "Docket",
         "choices": [
            {
                "display_name": "4: United States v. Goodwin",
                "value": "http://127.0.0.1:8000/api/rest/v3/dockets/4/"
            },
            {
                "display_name": "5: Quality Cleaning Products v. SCA Tissue of North America",
                "value": "http://127.0.0.1:8000/api/rest/v3/dockets/5/"
            },

....millions more....

I know that there's a way to disable listing these items in the form of the HTML view, but in the OPTIONS request we need better default functionality than displaying millions of records.

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