如何使用 Factory 对象覆盖 django 模型以避免访问数据库。
模型.py
from django.db import models
class ApplicationType(models.Model):
"""
Types of applications available in the system/
"""
title = models.CharField(max_length=30)
def __str__(self):
return self.title
实用程序.py
from .models import ApplicationType
self.base_details = {}
def get_application_type(self, value):
"""
Get types of applications. When successful it Populates the
self.base_details with an application_type key
Args:
value (object): value to be parsed
Returns:
bool: True when value is ok, Else false
Raises:
"""
item_name = "Application Type"
self.base_details['application_type'] = None
try:
if value:
try:
result = ApplicationType.objects.get(title=value) # <== How do I avoid hitting this DB object?
self.base_details['application_type'] = result.id
return True
except ApplicationType.DoesNotExist:
self.error_msg = "Invalid Value: {}".format(item_name)
return False
else:
self.error_msg = "Blank Value: {}".format(item_name)
return False
except:
raise
所以为了测试,我创建了一个 ApplicationType 工厂
测试.py
import factory
import pytest
application_types = ['Type 1', 'Type 2']
class ApplicationTypeFactory(factory.Factory):
class Meta:
model = ApplicationType
title = "application_type_title"
@pytest.mark.django_db()
def test_get_application_type_populates_dict_when_value_provided_exists_in_database(self):
"""Populates base_details dict when value is found in database"""
for entry in application_types:
application_type = ApplicationTypeFactory.build(title=entry)
assert self.base_info_values.get_application_type(entry) == True
assert self.base_info_values.base_details["application_type"] is not None
因此,您将如何编写一个测试来避免在ApplicationType.objects.get()
代码中间的查询中命中数据库?我可以将“模型”作为参数传递给函数吗?这会是一个好的设计吗?
您可以自由地为应用程序/功能提供替代结构,特别是允许在这种情况下进行更好的测试。
我正在运行 Python3.5、pytest-django 和 factory_boy