在管理员中按外键搜索

如何解决在管理员中按外键搜索

models.py

class supplier(models.Model):
   name = models.CharField(blank=True,max_length=50,)
   city = models.CharField(blank=True,max_length=50)
   email = models.CharField(blank=True,max_length=50)

class Product(models.Model):
   supplier = models.ForeignKey(supplier,on_delete=models.CASCADE)
   description = models.CharField(blank=True,max_length=100)
   DDT = models.FileField(upload_to="DDT/%Y/%m/%d")
   fattura = models.FileField(upload_to="DDT/%Y/%m/%d")

admin.py
     
@admin.register(supplier)
    class supplierModelAdmin(admin.ModelAdmin):
    model = supplier
  
@admin.register(Product)
    class ProductModelAdmin(admin.ModelAdmin):
    model = Product
    list_display = ['supplier']
    search_fields = [ 'supplier']

当我搜索供应商时，django 返回错误：

相关字段查找无效：​​icontains

解决方法

您可以使用 __ 表示法执行此操作。

所以你会这样做；

@admin.register(Product)
    class ProductModelAdmin(admin.ModelAdmin):
    model = Product
    list_display = ['supplier']
    search_fields = [
        'description','supplier__name','supplier__city','supplier__email'
    ]

搜索文档在这里； https://docs.djangoproject.com/en/3.1/ref/contrib/admin/#django.contrib.admin.ModelAdmin.search_fields