个回答

• Jack

  2019-04-25 14:40:25

  卧槽。。提交错地方了··

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• Jack

  2019-04-25 14:38:27

  前面的确一直没讲到调试，后面章节视频会介绍一下如何调试。

  

  我已经在前端，某条状态下评论了

  

  那里的↑  ↓  ^ 按钮，用用就知道了，鼠标放上面也有提示

  

  当我运行到第三个断点的时候，下面就能看到post数据了，self里面的内容可以好好研究下，望采纳~

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• Bleach丶MR

  2019-04-26 09:47:20

  数据库显示是id

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• Bleach丶MR

  2019-04-26 09:46:14

  class Teacher(models.Model):
      """讲师信息表"""
      nickname = models.CharField(max_length=30, primary_key=True, db_index=True, verbose_name="昵称")
  
      introduction = models.TextField(default="这位教师很懒，什么都没有留下。", verbose_name="简介")
      fans = models.PositiveIntegerField(default='0', verbose_name="粉丝数")    #非负整数类型
      created_at = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
      updated_at = models.DateTimeField(auto_now=True, verbose_name="更新时间")

  
  

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• Bleach丶MR

  2019-04-25 15:00:45

  import os
  import sys
  import django
  os.environ.setdefault("DJANGO_SETTINGS_MODULE", "imooc.settings")
  
  from datetime import date
  
  import random
  
  project_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
  sys.path.append(project_path)  # 将项目的路径添加到系统搜寻路径当中
  os.environ['DJANGO_SETTINGS_MODEL'] = 'imooc.settings'  # 设置项目配置文件
  django.setup()
  
  # 导入模型类
  from courses.models import Teacher, Course, Student, TeacherAssistant
  
  
  def import_data():
      """使用Django-ORM导入数据"""
  
      # 讲师数据导入   create()
      Teacher.objects.create(nickname="Jack", introduction="Python工程师", fans=666)
      Teacher.objects.create(nickname="Allen", introduction="Java工程师", fans=325)
      Teacher.objects.create(nickname="Hllen", introduction="全栈工程师", fans=4654)
  
      # 课程数据导入     bluk_create()
      Course.objects.bluk_create([Course(teacher=Teacher.objects.get(nickname="Jack"), title=f"Python系列教程{i}",
                                         type=random.choice(0, 1, 2), price=random.randint(200, 300),
                                         volume=random.randint(100, 10000), online=date(2018, 10, 1))
                                  for i in range(1, 5)])
      Course.objects.bluk_create([Course(teacher=Teacher.objects.get(nickname="Allen"), title=f"Java系列教程{i}",
                                         type=random.choice(0, 1, 2), price=random.randint(200, 300),
                                         volume=random.randint(100, 10000), online=date(2018, 8, 10))
                                  for i in range(1, 5)])
      Course.objects.bluk_create([Course(teacher=Teacher.objects.get(nickname="Hllen"), title=f"全栈系列教程{i}",
                                         type=random.choice(0, 1, 2), price=random.randint(200, 300),
                                         volume=random.randint(100, 10000), online=date(2018, 6, 25))
                                  for i in range(1, 5)])
  
      # 学生数据导入    update_or_create()
      Student.objects.update_or_create(nickname="A", defaults={"age": random.randint(18, 28),
                                                               "gender": random.choice(0, 1, 2),
                                                               "stydy_time": random.randint(9, 999)})
      Student.objects.update_or_create(nickname="B", defaults={"age": random.randint(18, 28),
                                                               "gender": random.choice(0, 1, 2),
                                                               "stydy_time": random.randint(9, 999)})
      Student.objects.update_or_create(nickname="C", defaults={"age": random.randint(18, 28),
                                                               "gender": random.choice(0, 1, 2),
                                                               "stydy_time": random.randint(9, 999)})
  
      # 正向添加
      # 销量大于等于1000的课程
      Student.objects.get(nickname="A").course.add(*Course.objects.filter(volume__gte=1000))
      # 销量大于5000的课程
      Student.objects.get(nickname="B").course.add(*Course.objects.filter(volume__gt=5000))
      # 反向添加
      # 学习时间大于等于500的同学
      Course.objects.get(title="Python系列教程1").student_set.add(*Student.objects.filter(study_time__gte=500))
      # 学习时间小于等于300小时
      Course.objects.get(title="Python系列教程2").student_set.add(*Student.objects.filter(study_time__lte=300))
  
      # 助教数据导入    get_or_create()
      TeacherAssistant.objects.get_or_create(nickname="助教1",
                                             defaults={"teacheer": Teacher.objects.get(nickname="Jack"), "hobby": "打篮球"})
      TeacherAssistant.objects.get_or_create(nickname="助教2",
                                             defaults={"teacheer": Teacher.objects.get(nickname="Allen"), "hobby": "看书"})
      TeacherAssistant.objects.get_or_create(nickname="助教3",
                                             defaults={"teacheer": Teacher.objects.get(nickname="Hllen"), "hobby": "旅游"})
  
      return True
  
  
  if __name__ == '__main__':
      if import_data():
          print("导入数据成功！")

  
  

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