Python orm.model_form方法代碼示例

# 需要導入模塊: from wtforms.ext.sqlalchemy import orm [as 別名]
# 或者: from wtforms.ext.sqlalchemy.orm import model_form [as 別名]
def model_fields(model, db_session=None, only=None, exclude=None,
                 field_args=None, converter=None, exclude_pk=False,
                 exclude_fk=False):
    """
    Generate a dictionary of fields for a given SQLAlchemy model.

    See `model_form` docstring for description of parameters.
    """
    mapper = model._sa_class_manager.mapper
    converter = converter or ModelConverter()
    field_args = field_args or {}
    properties = []

    for prop in mapper.iterate_properties:
        if getattr(prop, 'columns', None):
            if exclude_fk and prop.columns[0].foreign_keys:
                continue
            elif exclude_pk and prop.columns[0].primary_key:
                continue

        properties.append((prop.key, prop))

    # ((p.key, p) for p in mapper.iterate_properties)
    if only:
        properties = (x for x in properties if x[0] in only)
    elif exclude:
        properties = (x for x in properties if x[0] not in exclude)

    field_dict = {}
    for name, prop in properties:
        field = converter.convert(
            model, mapper, prop,
            field_args.get(name), db_session
        )
        if field is not None:
            field_dict[name] = field

    return field_dict 

# 需要導入模塊: from wtforms.ext.sqlalchemy import orm [as 別名]
# 或者: from wtforms.ext.sqlalchemy.orm import model_form [as 別名]
def ModelForm(model, db_session, exclude=None):
    return model_form(
        model=model,
        db_session=db_session,
        base_class=Form,
        exclude_fk=False,
        exclude=exclude
        ) 

# 需要導入模塊: from wtforms.ext.sqlalchemy import orm [as 別名]
# 或者: from wtforms.ext.sqlalchemy.orm import model_form [as 別名]
def model_form(model, db_session=None, base_class=Form, only=None,
               exclude=None, field_args=None, converter=None, exclude_pk=True,
               exclude_fk=True, type_name=None):
    """
    Create a wtforms Form for a given SQLAlchemy model class::

        from wtforms.ext.sqlalchemy.orm import model_form
        from myapp.models import User
        UserForm = model_form(User)

    :param model:
        A SQLAlchemy mapped model class.
    :param db_session:
        An optional SQLAlchemy Session.
    :param base_class:
        Base form class to extend from. Must be a ``wtforms.Form`` subclass.
    :param only:
        An optional iterable with the property names that should be included in
        the form. Only these properties will have fields.
    :param exclude:
        An optional iterable with the property names that should be excluded
        from the form. All other properties will have fields.
    :param field_args:
        An optional dictionary of field names mapping to keyword arguments used
        to construct each field object.
    :param converter:
        A converter to generate the fields based on the model properties. If
        not set, ``ModelConverter`` is used.
    :param exclude_pk:
        An optional boolean to force primary key exclusion.
    :param exclude_fk:
        An optional boolean to force foreign keys exclusion.
    :param type_name:
        An optional string to set returned type name.
    """
    if not hasattr(model, '_sa_class_manager'):
        raise TypeError('model must be a sqlalchemy mapped model')

    type_name = type_name or str(model.__name__ + 'Form')
    field_dict = model_fields(
        model, db_session, only, exclude, field_args, converter,
        exclude_pk=exclude_pk, exclude_fk=exclude_fk
    )
    return type(type_name, (base_class, ), field_dict)