添加多个标签模型

Question

我有以下型号：

class Investor(Profile): 
ROLE = (
    ('AN', 'Angel Investor'), 
    ('VC', 'Venture Capital'), 
    ('SC', 'Seed Capital') 
) 
role = models.CharField(max_length=2, default='AN', choices=ROLE) 
min_inv = models.DecimalField(
    default=0, max_digits=20, decimal_places=2, 
    verbose_name='Minimum Investments per year') 
max_inv = models.DecimalField(
    default=0, max_digits=20, decimal_places=2, 
    verbose_name='Maximum investments per year') 
no_startups = models.IntegerField(
    default=0, verbose_name='Number of investments per year') 
rating_sum = models.FloatField(default=0) 
no_raters = models.IntegerField(default=0) 

我想多个标签添加到这个模型。 - 类别 - 舞台 - 资金

我希望投资者要分配给多个类别，阶段和资金。 因此，投资者可以绑定到多个类别 和多个阶段 和多个资金类型。

我该如何编辑模型？

Answer 1

你能为相连模型添加ManyToMany关系么？

class Investor(Profile): 
    ROLE = (
    ('AN', 'Angel Investor'), 
    ('VC', 'Venture Capital'), 
    ('SC', 'Seed Capital') 
) 
    role = models.CharField(max_length=2, default='AN', choices=ROLE) 
    min_inv = models.DecimalField(
    default=0, max_digits=20, decimal_places=2, 
    verbose_name='Minimum Investments per year') 
    max_inv = models.DecimalField(
    default=0, max_digits=20, decimal_places=2, 
    verbose_name='Maximum investments per year') 
    no_startups = models.IntegerField(
    default=0, verbose_name='Number of investments per year') 
    rating_sum = models.FloatField(default=0) 
    no_raters = models.IntegerField(default=0) 
    categories = models.ManyToMany(Category) 
    stages = models.ManyToMany(Stage) 
    fundings = models.ManyToMany(Funding) 

使用多对多然后你可以分配阶段

investor = Investor.objects.all()[0] 
investor.categories.add(category_instance_one, category_instance_two) 
investor.categories.all() # retrieves all categories that this investor has