سؤال
لدي نموذجين في جانغو ل2د خريطة لعبة على أساس:
class Block(models.Model):
type = models.IntegerField()
class ShopBuilding(models.Model):
house_blocks = models.ManyToManyField(Block)
street_blocks = models.ManyToManyField(Block)
river_blocks = models.ManyToManyField(Block)
decoration_blocks = models.ManyToManyField(Block)
npc_blocks = models.ManyToManyField(Block)
الآن أريد فقط ربط هذين النموذجين باستخدام جدول واحد:
class ShopBlockAssoc(models.Model):
block = models.ForeignKey(Block)
shop = models.foreignKey(Shop)
بعد أن وضعت through
حقل في ShopBuilding
نموذج ، جانغو يلد فشل متعددة عندما سينكدب ، مثل
Error: One or more models did not validate:
tnew.shopbuilding: Accessor for m2m field 'house_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'house_blocks'.
tnew.shopbuilding: Accessor for m2m field 'house_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'house_blocks'.
tnew.shopbuilding: Accessor for m2m field 'house_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'house_blocks'.
tnew.shopbuilding: Accessor for m2m field 'house_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'house_blocks'.
tnew.shopbuilding: Accessor for m2m field 'street_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'street_blocks'.
tnew.shopbuilding: Accessor for m2m field 'street_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'street_blocks'.
tnew.shopbuilding: Accessor for m2m field 'street_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'street_blocks'.
tnew.shopbuilding: Accessor for m2m field 'street_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'street_blocks'.
tnew.shopbuilding: Accessor for m2m field 'river_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'river_blocks'.
tnew.shopbuilding: Accessor for m2m field 'river_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'river_blocks'.
tnew.shopbuilding: Accessor for m2m field 'river_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'river_blocks'.
tnew.shopbuilding: Accessor for m2m field 'river_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'river_blocks'.
tnew.shopbuilding: Accessor for m2m field 'decoration_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'decoration_blocks'.
tnew.shopbuilding: Accessor for m2m field 'decoration_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'decoration_blocks'.
tnew.shopbuilding: Accessor for m2m field 'decoration_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'decoration_blocks'.
tnew.shopbuilding: Accessor for m2m field 'decoration_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'decoration_blocks'.
tnew.shopbuilding: Accessor for m2m field 'npc_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'npc_blocks'.
tnew.shopbuilding: Accessor for m2m field 'npc_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'npc_blocks'.
tnew.shopbuilding: Accessor for m2m field 'npc_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'npc_blocks'.
tnew.shopbuilding: Accessor for m2m field 'npc_blocks' clashes with related m2m field 'Block.shopbuilding_set'. Add a related_name argument to the definition for 'npc_blocks'.
إذا قمت بتعيين db_table
يقول فيلد جانغو:
The model has two manually-defined m2m relations through the model, which is not permitted. Please consider using an extra field on your intermediary model instead.
كيف يمكنني إصلاح هذا?أريد حقا أن تأكد من تلك العلاقات متجر كتلة تستخدم تقاسم نفس نموذج مشارك وسيطة مع نفس دب_تابل
المحلول
المشكلة هي أنه على النموذج Block
يحاول إنشاء روابط عكسية.جانغو أسماء تلك الروابط على أساس النموذج ، في قضيتك لجميع مانيتوماني يحاول خلق shopbuilding_set
والأسماء تصطدم.لتجنب هذا إضافة related_name
, ، على سبيل المثال:
class ShopBuilding(models.Model):
house_blocks = models.ManyToManyField(Block, related_name="shopbuilding_house_set")
street_blocks = models.ManyToManyField(Block, related_name="shopbuilding_street_set")
river_blocks = models.ManyToManyField(Block, related_name="shopbuilding_river_set")
decoration_blocks = models.ManyToManyField(Block, related_name="shopbuilding_decoration_set")
npc_blocks = models.ManyToManyField(Block, related_name="shopbuilding_npc_set")
ثم عليك أن تكون قادرا على الوصول إلى ShopBuilding
من عند Block
مثيل مثل هذا:
block.shopbuilding_npc_set.all()
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