def dict_field(data, field=None, required=True):
""" dict validator.
Args:
data: If `field` is None, `data` is `field`, otherwise get `field` from `data`.
field: If `field` is None, `data` is `field`, otherwise get `field` from `data`.
required: if `field` must in `data`, True or False, default is True.
Returns:
1. Dict field.
2. If `field` is not exits and required is False, return None.
Raise:
ValidationError: The type of `field` is not dict.
"""
field_data = _field(data, field, required)
if not field_data and not required:
return None
if isinstance(field_data, str):
try:
field_data = json.loads(field_data)
except:
raise exceptions.ValidationError(
"The type of `{field}` is not dict".format(
field=field or data))
if not isinstance(field_data, dict):
raise exceptions.ValidationError(
"The type of `{field}` is not dict".format(field=field or data))
return field_data
def _field(data, field, required):
if field:
data = data or {}
if not isinstance(data, dict):
raise exceptions.ValidationError("field `{field}` lost".format(field=field))
if required and field not in data:
raise exceptions.ValidationError("field `{field}` lost".format(field=field))
return data.get(field)
else:
return data
def bool_field(data, field=None, required=True):
""" bool validator.
Args:
data: If `field` is None, `data` is `field`, otherwise get `field` from `data`.
field: If `field` is None, `data` is `field`, otherwise get `field` from `data`.
required: if `field` must in `data`, True or False, default is True.
Returns:
1. If `field` value is "True" or "true", return True;
2. If `field` value is "False" or "false", return False;
3. If `field` is not exits and required is False, return None.
Raise:
ValidationError: The type of `field` is not bool.
"""
field_data = _field(data, field, required)
if str(field_data).lower() == "true":
return True
if str(field_data).lower() == "false":
return False
if not required:
return None
raise exceptions.ValidationError(
"The type of `{field}` is not bool".format(field=field or data))
def float_field(data, field=None, required=True):
""" float validator.
Args:
data: If `field` is None, `data` is `field`, otherwise get `field` from `data`.
field: If `field` is None, `data` is `field`, otherwise get `field` from `data`.
required: if `field` must in `data`, True or False, default is True.
Returns:
1. Float field.
2. If `field` is not exits and required is False, return None.
Raise:
ValidationError: The type of `field` is not float.
"""
field_data = _field(data, field, required)
if not field_data and not required:
return None
try:
return float(field_data)
except:
raise exceptions.ValidationError("The type of `{field}` is not float".format(field=field or data))
