Question

所以我有这两个班

class Tweet 
  include Neo4j::ActiveNode
  property :content, type: String

  property :created_at, type: DateTime
  property :updated_at, type: DateTime
  has_one(:user, :tweeted).from(:User)
end

class User 
  include Neo4j::ActiveNode
  property :username, type: String
  property :name, type: String
  property :email, type: String, default: ''
  validates :email, :username, uniqueness: true
  property :encrypted_password
  has_many(:Tweet, :tweeted)
end

每当我运行rails neo4j：migrate时，都会出现这样的错误

ArgumentError：必须指定'type'选项（即使它是nil）或origin / rel_class也必须指定（Class #tweeted）

如何在neo4jrb中正确创建节点之间的关系？

Answer 1

如错误消息所述，您没有明确定义tweeted关系的类型。查看django-categories了解更多详细信息。但是，以下方法应该起作用：

class Tweet 
  include Neo4j::ActiveNode
  property :content, type: String
  property :created_at, type: DateTime
  property :updated_at, type: DateTime
  has_one :out, :author, type: :author, model_class: :User
end

class User 
  include Neo4j::ActiveNode
  property :username, type: String
  property :name, type: String
  property :email, type: String, default: ''
  validates :email, :username, uniqueness: true
  property :encrypted_password
  has_many :in, :tweets, origin: :author
end

Rails Neo4j迁移参数错误

1 个答案: