45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
from marshmallow import SchemaOpts
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from marshmallow import pre_load, post_dump
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from marshmallow_sqlalchemy import ModelSchemaOpts, ModelConverter, ModelSchema
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from .. import ma
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from .. import db
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class NamespaceOpts(ModelSchemaOpts):
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"""Same as the default class Meta options, but adds "name" and
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"plural_name" options for enveloping.
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"""
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def __init__(self, meta, **kwargs):
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SchemaOpts.__init__(self, meta, **kwargs)
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self.name = getattr(meta, "name", None)
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self.plural_name = getattr(meta, "plural_name", self.name)
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self.model = getattr(meta, "model", None)
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self.model_converter = getattr(meta, "model_converter", ModelConverter)
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self.include_fk = getattr(meta, "include_fk", False)
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self.transient = getattr(meta, "transient", False)
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self.sqla_session = db.session
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self.load_instance = True
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self.include_relationships = True
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#class NamespacedSchema(ma.SQLAlchemySchema):
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class NamespacedSchema(ModelSchema):
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OPTIONS_CLASS = NamespaceOpts
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@pre_load(pass_many=True)
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def unwrap_envelope(self, data, many, **kwargs):
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key = self.opts.plural_name if many else self.opts.name
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if key in data:
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return data[key]
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else:
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return data
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@post_dump(pass_many=True)
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def wrap_with_envelope(self, data, many, **kwargs):
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if 'noenvelope' in self.context and self.context['noenvelope']:
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return data
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else:
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key = self.opts.plural_name if many else self.opts.name
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return {key: data}
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