Django InlineModelAdmin给出错误' MediaDefiningClass'对象不可迭代

时间:2017-01-26 16:38:56

标签: django django-models django-admin

来自models.py

class Indicator(models.Model):
    name = models.CharField(max_length=50)
    youtube = models.CharField(max_length=LONG_BLOG_POST_CHAR_LEN)
    description = models.CharField(max_length=LONG_BLOG_POST_CHAR_LEN)    
    recommendation = models.CharField(max_length=LONG_BLOG_POST_CHAR_LEN)
    isPublic = models.BooleanField(default=False)
    methods_path = models.CharField(max_length=100,default=None)
    meta_description = models.CharField(max_length=150,default='')
    image_path = models.CharField(max_length=100,blank=True)

    def __str__(self):
        return self.name   

class IndicatorParameterInt(models.Model):
    name = models.CharField(max_length=50)
    value = models.IntegerField(default=1)
    indicator_int_parameter = models.ForeignKey(Indicator, on_delete=models.CASCADE)
    hidden = models.BooleanField(default=False)

class IndicatorParameterFloat(models.Model):
    name = models.CharField(max_length=50)
    setting = models.FloatField(default=1)
    indicator_float_parameter = models.ForeignKey(Indicator, on_delete=models.CASCADE)
    hidden = models.BooleanField(default=False)

class Comparison(models.Model):
    name = models.CharField(max_length=100)

来自admin.py

from django.contrib import admin
from .models import *

# Register your models here.
admin.site.register( MarketData )
admin.site.register( Indicator )
admin.site.register( UserProfile )



class IndicatorParameterIntInline(admin.TabularInline):
    model = IndicatorParameterInt
    fk_name = "indicator_int_parameter"

class IndicatorParameterFloatInline(admin.TabularInline):
    model = IndicatorParameterFloat
    fk_name = "indicator_float_parameter"   

class ComparisonInline(admin.TabularInline):
    model = Comparison
    fk_name = "Comparison"  

class IndicatorInline(admin.ModelAdmin):
    inlines = [ 
                IndicatorParameterIntInline,
                IndicatorParameterFloatInline,
                ComparisonInline, 
              ]

admin.site.unregister( Indicator )
admin.site.register( IndicatorInline )

错误 TypeError:' MediaDefiningClass'对象不可迭代出现在admin的最后一行:admin.site.register(IndicatorInline)。如果我首先尝试注册IndicatorInline或任何外键类都没有关系。

我引用了this post,鼓励使用fk_name属性。无论我是否使用fk_name,都会发生错误。

2 个答案:

答案 0 :(得分:5)

注册模型管理类时需要指定模型。

admin.site.register(Indicator, IndicatorInline)

请注意,如果您从模块顶部删除admin.site.register( Indicator ),则无需稍后致电admin.site.unregister(Indicator)

我建议重命名IndicatorInline - 这是一个内联的模型管理员,因此最好将其命名为IndicatorAdmin。在这种情况下,您可以注册:

admin.site.register(Indicator, IndicatorAdmin)

答案 1 :(得分:3)

首先,尽量不要使用import * - 始终导入您正在使用的模型。

接下来,我认为改变这一点就足够了

from django.contrib import admin
from .models import *





class IndicatorParameterIntInline(admin.TabularInline):
    model = IndicatorParameterInt
    fk_name = "indicator_int_parameter"

class IndicatorParameterFloatInline(admin.TabularInline):
    model = IndicatorParameterFloat
    fk_name = "indicator_float_parameter"   

class ComparisonInline(admin.TabularInline):
    model = Comparison
    fk_name = "Comparison"  

class IndicatorInline(admin.ModelAdmin):
    inlines = [ 
                IndicatorParameterIntInline,
                IndicatorParameterFloatInline,
                ComparisonInline, 
              ]

admin.site.register(Indicator, IndicatorInline)
admin.site.register(MarketData, )
admin.site.register(UserProfile, )