Error: Entity metadata was not found

See original GitHub issue

// conversation_pairs.ts

@Entity()
export class ConversationPairs {

  @PrimaryGeneratedColumn()
  id: number;

  @ManyToOne(type => Users, user_id => user_id.conversation_pairs, {
    cascadeRemove: true,
    nullable: false
  })
  user_id: Users;

  @ManyToOne(type => Agents, agent_id => agent_id.conversation_pairs, {
    cascadeRemove: true,
    nullable: false
  })
  agent_id: Agents;
}

// user.ts

@Entity()
export class Users {
  @PrimaryGeneratedColumn()
  id: number;

  @OneToMany(type => ConversationPairs, conversation_pairs => conversation_pairs.user_id)
  conversation_pairs: ConversationPairs[];
}

// agent.ts

@Entity()
export class Agents {

  @PrimaryGeneratedColumn()
  id: number;

  @OneToMany(type => ConversationPairs, conversation_pairs => conversation_pairs.agent_id)
  conversation_pairs: ConversationPairs[];
}

I have these 3 files and getting this error when I start my app.

Error: Entity metadata for ConversationPairs#user_id was not found.
    at /Users/xuanrong/Sites/calllevels/dbs-chat/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:272:27
    at Array.forEach (native)
    at /Users/xuanrong/Sites/calllevels/dbs-chat/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:269:38
    at Array.forEach (native)
    at EntityMetadataBuilder.build (/Users/xuanrong/Sites/calllevels/dbs-chat/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:268:25)
    at EntityMetadataBuilder.buildFromMetadataArgsStorage (/Users/xuanrong/Sites/calllevels/dbs-chat/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:152:21)
    at Connection.buildMetadatas (/Users/xuanrong/Sites/calllevels/dbs-chat/node_modules/typeorm/connection/Connection.js:552:18)
    at Connection.<anonymous> (/Users/xuanrong/Sites/calllevels/dbs-chat/node_modules/typeorm/connection/Connection.js:174:30)
    at step (/Users/xuanrong/Sites/calllevels/dbs-chat/node_modules/typeorm/connection/Connection.js:32:23)
    at Object.next (/Users/xuanrong/Sites/calllevels/dbs-chat/node_modules/typeorm/connection/Connection.js:13:53)

Not sure what to do, need some help on this.

Issue Analytics

State:
Created 6 years ago
Reactions:28
Comments:66 (10 by maintainers)

Top GitHub Comments

222reactions

tomkroeningcommented, Apr 29, 2017

I ran into the same issue.

TypeORM is very difficult to debug with args and meta data classes/collections all over the place. After many hours I was able to figure it out.

So this relationship is failing because EntityMetadataBuilder.ts is trying to tie the type of the ManyToOne column with a known entity type using “===”.

var inverseEntityMetadata = entityMetadatas.find(function (m) { return m.target === relation.type || (typeof relation.type === "string" && m.targetName === relation.type); });

Looking at relation.type I could see that it is the same “type” as m.target however they were not pointing to the same reference of the defined type. It seemed to me as if my related class was being loaded by node more than once. After reading about how node caches modules I was able to fix my problem by making sure all of my import statements were referencing the same file including uppercase/lowercase letters in the string.

In one file I had

import { Category } from "./models/category";

and the other I had

import { Category } from "./Category";

Notice the uppercase “C”. After replacing with a lowercase “c” everything worked as expected.

106reactions

pleerockcommented, Jun 17, 2017

Conclusion: this error happening when you have misspelled your entity name, misspelled import paths or did not include your entity in connection configuration.