Understand the data generation rules and configuration methods of the Modelmommy class library

Understand the data generation rules and configuration methods of the Modelmommy class library Modelmommy is a Python class library for generating model objects.It can help developers quickly create model data, thereby simplifying the compilation process of unit testing and integrated testing.This article will introduce the data generation rules and configuration methods of the ModelMomMy library, as well as related programming code and configuration examples. First, we need to install the ModelMomMy library.You can use the following command to install Modelmommy in the Python environment: python pip install modelmommy After the installation is completed, we can start using Modelmommy to generate model data. 1. Create a model object First of all, we need to import the Modelmommy class library and create a model object.The following is an example. A model object called "Article" is created: python from model_mommy import mommy class Article(models.Model): title = models.CharField(max_length=100) content = models.TextField() published_date = models.DateTimeField() # Create the Article model object article = mommy.make(Article) In the above code, we introduced the Modelmommy class library and used the `mommy.make () method to create an Article model object.This method will automatically fill the fields of the model object for us so that we can perform subsequent testing. 2. Customized model object Modelmommy also allows us to customize the field value of the model object.The following is an example that created a trick model object with "Python programming": python Article = Mommy.make (Article, Title = "Python Programming Introduction") In the above code, we customize the value of the Title field of the Article model object by passing a parameter `title =" python programming entry "` `mommy.make ()` method. 3. Related model object Modelmommy also supports creating associated objects.The following is an example that created a Comment object associated with the Article object: python class Comment(models.Model): article = models.ForeignKey(Article, on_delete=models.CASCADE) content = models.TextField() created_date = models.DateTimeField() # Create a related COMMENT model object comment = mommy.make(Comment, article=article) In the above code, we define a Comment model, where the Article field is associated with the Article model.Through the parameters of the method of `Mommy.make ()` Article = Article`, we can associate the newly created Article model objects with the COMMENT model object. In terms of configuration, Modelmommy also allows us to customize data generating by customizing the rules of the field value.We can use the `Mommy_custom_fields_gen` configuration item in the settings.py file to configure.The following is the configuration of an example: python MOMMY_CUSTOM_FIELDS_GEN = { 'django.db.models.FileField': lambda: 'path/to/fake/file.txt', 'django.db.models.ImageField': lambda: 'path/to/fake/image.jpg', } In the above configuration, we have added custom rules to Filefield and ImageField fields.These rules are automatically applied when Modelmommy generates model objects. Through the above introduction, we learned about the data generation rules and configuration methods of the Modelmommy class library.It can help us quickly create model data to simplify the test process.I hope this article will help you understand the Modelmommy class library.