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67 lines
1.9 KiB
Python
67 lines
1.9 KiB
Python
'''Quick and dirty shim for JSONField and ArrayField compatibility on sqlite.
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For more info and original code, see:
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- https://medium.com/@philamersune/using-postgresql-jsonfield-in-sqlite-95ad4ad2e5f1
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- https://gist.github.com/pvsune/2e5f9f9ae356d0bff633d896bc7d168b#file-django-sqlite-fields-py
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'''
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import json
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from django.conf import settings
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from django.contrib.postgres.fields import (
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JSONField as DjangoJSONField,
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ArrayField as DjangoArrayField,
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)
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from django.db.models import Field
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class JSONField(DjangoJSONField):
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pass
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class ArrayField(DjangoArrayField):
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pass
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if 'sqlite' in settings.DATABASES['default']['ENGINE']:
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class JSONField(Field):
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def db_type(self, connection):
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return 'text'
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def from_db_value(self, value, expression, connection):
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if value is not None:
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return self.to_python(value)
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return value
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def to_python(self, value):
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if value is not None:
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try:
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return json.loads(value)
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except (TypeError, ValueError):
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return value
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return value
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def get_prep_value(self, value):
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if value is not None:
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return str(json.dumps(value))
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return value
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def value_to_string(self, obj):
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return self.value_from_object(obj)
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class ArrayField(JSONField):
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def __init__(self, base_field, size=None, **kwargs):
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"""Care for DjangoArrayField's kwargs."""
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self.base_field = base_field
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self.size = size
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return super().__init__(**kwargs)
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def deconstruct(self):
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"""Need to create migrations properly."""
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name, path, args, kwargs = super().deconstruct()
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kwargs.update({
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'base_field': self.base_field.clone(),
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'size': self.size,
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})
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return name, path, args, kwargs |