Question

我试图用来自外部CSV文件的数据填充Django SQL数据库，但是当我运行填充文件时，父ManyToManyField模型（Film）将不接受我从子对象（演员）提供的查询对象模型，因为（我认为）这是一个列表。是否可以使用get_or_create调用将列表解析为模型？如果没有，我该如何解决此问题？

我的models.py文件如下：

class Actor(models.Model):
    actor_id = models.CharField(max_length=20, unique=True)
    name = models.CharField(max_length=40)

class Film(models.Model):
    film_id = models.CharField(max_length=20, unique=True)
    title = models.CharField(max_length=60)
    actors = models.ManyToManyField(Actor)

我的populate.py文件如下所示：

import pandas   
df = read_csv('csv_file.csv')

def populate_film():
    for index, row in in df.iterrows():
        film_csv_id = str(row['IMDb ID'])
        film_name = str(row['Film'])
        list_of_actors = row['Actors']

    #The CSV actors column returns a the list of actor_ids which I query against the Actor model
    #I then put these queries into a list for the get_or_create step

    actor_query_list = []
    for actor_csv_id in list_of_actors:
        actor_query = Actor.objects.get(actor_id = actor_csv_id)
        actor_query_list.append(actor_query.id)

    film = Film.objects.get_or_create(film_id = film_csv_id, title = film_name, actors = actor_query_list)

我收到的错误消息为：

Field 'id' expected a number but got [xxxx, xxxx].

谢谢！

Answer 1

如果要将字段用作ID而不是默认ID字段，则应将“ primary_key”属性设置为True，如下所示：

actor_id = models.CharField(max_length=20, primary_key=True)

可能会解决您的问题

问题与列表填充Django多对多关系

1 个答案: