27 lines
825 B
Python
27 lines
825 B
Python
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from .base import Operation
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from django.db.migrations.state import ModelState
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class CreateModel(Operation):
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"""
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Create a model's table.
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"""
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def __init__(self, name):
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self.name = name
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def state_forwards(self, app, state):
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state.models[app, self.name.lower()] = ModelState(state, app, self.name)
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def database_forwards(self, app, schema_editor, from_state, to_state):
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app_cache = to_state.render()
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schema_editor.create_model(app_cache.get_model(app, self.name))
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def database_backwards(self, app, schema_editor, from_state, to_state):
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"""
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Performs the mutation on the database schema in the reverse
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direction - e.g. if this were CreateModel, it would in fact
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drop the model's table.
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"""
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raise NotImplementedError()
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