On Mon, Jan 28, 2019 at 5:57 AM <dan.bar....@huawei.com> wrote:
>
>
> Lets say I have a class
>
> class Dog(AlchemyBase):
> __tablename__ = 'dogs'
> name = Column(String, primary_key=True)
> color = Column(String)
> flees = relationship("Flee", backref="dogs")
>
>
>
> How can I get the list of fields ['name', 'color', 'flees'] from the class?
>
> I'd like to write a generic load(Dog, dict) method, that will create a Dog()
> with the field values that exist in dict.
>
> e.g.
> d = {'name: 'snoopy', 'junk': 1}
> dog = load(Dog, d)
> is equivalent to dog = Dog(name = 'snoopy')
>
> d1 = {'alias' : 'kitti'}
> but load(Cat, d1)
> is equivalent to cat = Cat(alias = 'kitti)
>
> Load will pick field names that exist in the passed Object, and have a value
> in dict
the names you can get using inspect
from sqlalchemy import inspect
attr_names = inspect(Dog).attrs.keys()
but a typical mapped class can take that dictionary directly in the constructor
def load(cls, dict_):
return cls(**dict_)
is what you describe
>
> Thanks,
> Dan
>
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> SQLAlchemy -
> The Python SQL Toolkit and Object Relational Mapper
>
> http://www.sqlalchemy.org/
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SQLAlchemy -
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http://www.sqlalchemy.org/
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