使用正確的資料型別時，使用Cerberus驗證JSON架構會引發錯誤

我正在嘗試驗證 JSON 模式。date為Cerberus指定正確的資料型別時released會引發錯誤。

def test_validate_books_schema():
    schema = {
            "url" : {'type': 'string'},
            "name" : {'type': 'string'},
            "isbn" : {'type': 'string'},
            "authors" : {'type': ['string','list']},
            "numberOfPages" : {'type': 'integer'},
            "publisher" : {'type': 'string'},
            "country" : {'type': 'string'},
            "mediaType" : {'type': 'string'},
            "released" : {'type': 'date'},
            "characters" : {'type': ['string','list']},
            "povCharacters" : {'type': ['string','list']}            
        }

    response = requests.get("https://www.anapioficeandfire.com/api/books/1")
    
    v = Validator(schema)
    validate_response = v.validate(response.json())
    assert_that(validate_response, description=v.errors).is_true()

./tests/books/test_books.py::test_validate_books_schema Failed: [undefined]AssertionError: [{'released': ['must be of date type']}] Expected <True>, but was not.
def test_validate_books_schema():
        schema = {
                "url" : {'type': 'string'},
                "name" : {'type': 'string'},
                "isbn" : {'type': 'string'},
                "authors" : {'type': ['string','list']},
                "numberOfPages" : {'type': 'integer'},
                "publisher" : {'type': 'string'},
                "country" : {'type': 'string'},
                "mediaType" : {'type': 'string'},
                "released" : {'type': 'date'},
                "characters" : {'type': ['string','list']},
                "povCharacters" : {'type': ['string','list']}
            }
    
        response = requests.get("https://www.anapioficeandfire.com/api/books/1")
    
        v = Validator(schema)
        validate_response = v.validate(response.json())
>       assert_that(validate_response, description=v.errors).is_true()
E       AssertionError: [{'released': ['must be of date type']}] Expected <True>, but was not.

tests\books\test_books.py:42: AssertionError

檔案指出資料型別released為. Date當我指定string它released作業時。

uj5u.com熱心網友回復：

稍微改變你的代碼，如下所示：

from cerberus import Validator
from assertpy import assert_that
from datetime import datetime
import requests

def date_hook(json_dict):
    for (key, value) in json_dict.items():
        try:
            json_dict[key] = datetime.strptime(value, "%Y-%m-%dT%H:%M:%S")
        except:
            pass
    return json_dict

def test_validate_books_schema():
    schema = {
            "url" : {'type': 'string'},
            "name" : {'type': 'string'},
            "isbn" : {'type': 'string'},
            "authors" : {'type': ['string','list']},
            "numberOfPages" : {'type': 'integer'},
            "publisher" : {'type': 'string'},
            "country" : {'type': 'string'},
            "mediaType" : {'type': 'string'},
            "released" : {'type': 'date'},
            "characters" : {'type': ['string','list']},
            "povCharacters" : {'type': ['string','list']}            
        }

    response = requests.get("https://www.anapioficeandfire.com/api/books/1")

    v = Validator(schema)
    validate_response = v.validate(response.json(object_hook=date_hook))
    assert_that(validate_response, description=v.errors).is_true()

test_validate_books_schema()
print('Done')

我們在這里所做的是在response.json呼叫中添加一個物件鉤子date_hook，它適當地格式化日期/時間（見這個答案）

運行檔案后，您應該不會收到任何錯誤。

標籤：python-3.x pytest 地狱犬

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