table name is not auto-generated while the primary key is defined in __table_args__

[WindSoilder]

Take these code as example:

app = Flask(__name__)
db = SQLAlchemy()
db.init_app(app)


class Plan(db.Model):
    __table_args__ = (
        db.PrimaryKeyConstraint('id', name='pk_plan'),
        db.UniqueConstraint('name', name='uq_plan')
     )
    id = db.Column(db.Integer)
    name = db.Column(db.String(50))

with app.app_context():
    db.create_all()

When try to generate the table, an error is occurred. The trace back information is something like this:

Traceback (most recent call last):
  File "model.py", line 13, in <module>
    class Plan(db.Model):
    File "/home/zero/study/python_env/for_cl/lib/python3.5/sitepackages/flask_sqlalchemy/__init__.py", line 603, in __init__
      DeclarativeMeta.__init__(self, name, bases, d)
    File "/home/zero/study/python_env/for_cl/lib/python3.5/sitepackages/sqlalchemy/ext/declarative/api.py", line 64, in __init__
      _as_declarative(cls, classname, cls.__dict__)
    File "/home/zero/study/python_env/for_cl/lib/python3.5/sitepackages/sqlalchemy/ext/declarative/base.py", line 88, in _as_declarative
       _MapperConfig.setup_mapping(cls, classname, dict_)
    File "/home/zero/study/python_env/for_cl/lib/python3.5/sitepackages/sqlalchemy/ext/declarative/base.py", line 103, in setup_mapping
      cfg_cls(cls_, classname, dict_)
    File "/home/zero/study/python_env/for_cl/lib/python3.5/sitepackages/sqlalchemy/ext/declarative/base.py", line 133, in __init__
      self._setup_inheritance()
    File "/home/zero/study/python_env/for_cl/lib/python3.5/sitepackages/sqlalchemy/ext/declarative/base.py", line 430, in _setup_inheritance
      "table-mapped class." % cls
sqlalchemy.exc.InvalidRequestError: Class <class '__main__.Plan'> does not have a __table__ or __tablename__ specified and does not inherit from an existing table-mapped class.

May be it can be enhanced by support the table defined schema like this ?

[davidism]

This is handled by #541.