Doctrine PHP Question
I was wondering if you can specify the order in which table definitions and data fixtures are loaded using the CLI. My problem is that I have two tables, each having a foreign key constraint pointing to the other, so one of the constraints needs to be added after a record has been added. Or maybe there's a better way of doing this...I'm no db expert and my head is fuzzy today.
Schema:
CREATE TABLE clients (
id INT AUTO_INCREMENT,
name VARCHAR(255), address VARCHAR(255),
primary_contact_user_id INT # References a user record in the users table
...
);
CREATE TABLE users (
id INT AUTO_INCREMENT,
username VARCHAR(255),
client_id INT # References a client record in the clients table
...
);
ALTER TABLE clients
ADD CONSTRAINT clients_primary_contact_user_id_users_id
FOREIGN KEY (p开发者_如何学运维rimary_contact_user_id) REFERENCES users(id);
ALTER TABLE users
ADD CONSTRAINT users_client_id_clients_id
FOREIGN KEY (client_id) REFERENCES clients(id);
I'm also not a DB expert, but I do spend a lot of time working with them. I believe the circular reference is actually incorrect.
Regardless of whether DB theory sanctions it or not, you could get one field though a join to another table, so it is an unnecessary circular reference. I'd suggest that you eliminate one and alter any queries to reflect this change.
Based on a guess, I'd suggest that you eliminate primary_contact_user_id
, as that almost sounds like a possible many-to-many relationship where a single item is elected as "primary"...
If you feel this design is necessary, can you please explain why?
put the INSERT statements between the CREATE TABLE and ALTER TABLE statements.
精彩评论