mirror of
https://github.com/kennethreitz/pydantic.git
synced 2026-06-05 23:00:18 +00:00
Samuel Eklund
7bd635c21c
* add description of subclass each_item scenario * add example of subclass validator with each_item * each_item causes validator to not run when parent class has List field #1566
37 lines
861 B
Python
37 lines
861 B
Python
from typing import List
|
|
from pydantic import BaseModel, ValidationError, validator
|
|
|
|
|
|
class ParentModel(BaseModel):
|
|
names: List[str]
|
|
|
|
|
|
class ChildModel(ParentModel):
|
|
@validator('names', each_item=True)
|
|
def check_names_not_empty(cls, v):
|
|
assert v != '', 'Empty strings are not allowed.'
|
|
return v
|
|
|
|
|
|
# This will NOT raise a ValidationError because the validator was not called
|
|
try:
|
|
child = ChildModel(names=['Alice', 'Bob', 'Eve', ''])
|
|
except ValidationError as e:
|
|
print(e)
|
|
else:
|
|
print('No ValidationError caught.')
|
|
|
|
|
|
class ChildModel2(ParentModel):
|
|
@validator('names')
|
|
def check_names_not_empty(cls, v):
|
|
for name in v:
|
|
assert name != '', 'Empty strings are not allowed.'
|
|
return v
|
|
|
|
|
|
try:
|
|
child = ChildModel2(names=['Alice', 'Bob', 'Eve', ''])
|
|
except ValidationError as e:
|
|
print(e)
|