如何在 Doctrine 中创建关系

Question

i learn Symfony and Doctrine with Jobeet. I would like add relation in JobeetJob. this is original: http://www.symfony-project.org/jobeet/1_4/Doctrine/en/03

I do like this:

JobeetCategory:
  actAs: { Timestampable: ~ }
  columns:
    name: { type: string(255), notnull: true, unique: true }

JobeetCategorya:
  actAs: { Timestampable: ~ }
  columns:
    name: { type: string(255), notnull: true, unique: true }

JobeetJob:
  actAs: { Timestampable: ~ }
  columns:
    category_id:  { type: integer, notnull: true }
    categorya_id:  { type: integer, notnull: true }
    type:         { type: string(255) }
    (...)
    expires_at:   { type: timestamp, notnull: true }
  relations:
    JobeetCategory: { onDelete: CASCADE, local: category_id, foreign: id, foreignAlias: JobeetJobs }
    JobeetCategorya: { onDelete: CASCADE, local: categorya_id, foreign: id, foreignAlias: JobeetJobsa }

when i do:

php symfony doctrine:build --all --and-load

i have error

SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails ( jobeet . jobeet_job , CONSTRAINT jobeet_job_categorya_id_jobeet_categorya_id FOREIGN KEY ( categorya_id ) REFERENCES jobeet_categorya ( id ) ON DELETE CASCADE)

why?

Answer 1

I'm thinking the problem is caused by the --and-load part of that command. That error comes up often when you're loading fixtures into tables in an order that would violate their foreign key relationships (ie putting child data in before parent data).

If this is indeed your problem, you can find several threads here on how to work around this issue... basically, by just building first ( build --all ), and then loading fixtures in separate batches so they respect the foreign key relationships.