Question

我是 Django - ORM 的新手，面临创建关系的问题。数据库是 SQLite 。

我正在尝试解决以下问题 -

用户将为他/她的个人资料添加不同的技能。他/她也可以   创造以前不存在的新技能，并可以添加到   个人资料。

其他用户可以在用户档案上提升技能 - 这应该是   也记录在数据库中。

直到我没有创建以下模型

   #import from django models module
from django.db import models

# This class will more or less map to a table in the database and defines skills at the application level
class Skill (models.Model):
    # this defines a required name that cannot be more than 100 characters.
    skill_name = models.CharField(max_length=100,unique=True)

    class Meta:
        app_label = "wantedly_webapp"

# This class will more or less map to a table in the database and defines the many to many relationship between user-skill, this is our intermediate model
class UserSkill(models.Model):
    """ A Model for representing skill in user profile """
    unique_together = (('user', 'skill_item'),)

    user = models.ForeignKey('UserProfile',on_delete=models.CASCADE)

    # Define a foreign key relating this model to the Skill model.
    # The parent user will be able to access it's skills with the related_name
    # 'all_user_skills'. When a parent is deleted, this will be deleted as well. 
    skill_item = models.ForeignKey(
        Skill,
        related_name='all_user_skills', on_delete=models.CASCADE
    )

    def __str__(self):
        """Return a human readable representation of the model instance."""
        return "{}".format(self.skill_item.skill_name)

# this class adds a Many to Many field in existing django-rest auth UserProfile class for  user and his/her skills 
class UserProfile(models.Model):
    user = models.OneToOneField('auth.User',unique=True,on_delete=models.CASCADE)
    user_skills = models.ManyToManyField(
            Skill,
            through='UserSkill',
            through_fields=('user','skill_item')
        )

class UserSkillUpvotes(models.Model):
    unique_together = (('user_skill', 'upvote_by'),)
    user_skill = models.OneToOneField('UserSkill',unique=True,on_delete=models.CASCADE)
    upvote_by =  models.OneToOneField('auth.User',unique=True,on_delete=models.CASCADE)

我现在已经创建了模型，接下来我需要有关如何测试它的帮助并更新是否需要执行任何操作，例如

添加新技能
将现有技能添加到用户个人资料
其他用户等在当前用户资料中保存技能投票

Django模型 - 检查模型的有效性

0 个答案: