31 lines
880 B
Python
31 lines
880 B
Python
def chained_join(*relationships):
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"""
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Return a chained Join object for given relationships.
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"""
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property_ = relationships[0].property
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if property_.secondary is not None:
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from_ = property_.secondary.join(
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property_.mapper.class_.__table__,
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property_.secondaryjoin
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)
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else:
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from_ = property_.mapper.class_.__table__
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for relationship in relationships[1:]:
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prop = relationship.property
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if prop.secondary is not None:
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from_ = from_.join(
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prop.secondary,
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prop.primaryjoin
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)
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from_ = from_.join(
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prop.mapper.class_,
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prop.secondaryjoin
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)
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else:
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from_ = from_.join(
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prop.mapper.class_,
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prop.primaryjoin
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)
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return from_
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