42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
from django.core.urlresolvers import reverse
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from django.db import models
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class MinMaxIntegerField(models.IntegerField):
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"""
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IntegerField with options to set a min- and a max-value.
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"""
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def __init__(self, min_value=None, max_value=None, *args, **kwargs):
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self.min_value, self.max_value = min_value, max_value
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super(MinMaxIntegerField, self).__init__(*args, **kwargs)
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def formfield(self, **kwargs):
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defaults = {'min_value': self.min_value, 'max_value': self.max_value}
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defaults.update(kwargs)
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return super(MinMaxIntegerField, self).formfield(**defaults)
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class RESTModelMixin:
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"""
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Mixin for django models which are used in our rest api.
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"""
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def get_root_rest_element(self):
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"""
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Returns the root rest instance.
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Uses self as default.
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"""
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return self
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def get_root_rest_url(self):
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"""
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Returns the detail url of the root model of this object.
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"""
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# Gets the default url-name in the same way as django rest framework
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# does in relations.HyperlinkedModelSerializer
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root_instance = self.get_root_rest_element()
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rest_url = '%s-detail' % type(root_instance)._meta.object_name.lower()
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return reverse(rest_url, args=[str(root_instance.pk)])
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