Save not appending associated foreign key values

[Lucas Savva]

I'm trying to use the associations system to insert data into 3 tables...

projects -----< jobs -----< stages
fk_cols: project      job

Here's the code I'm running (I'm generalizing the columns where possible):

const db = patio.createConnection('mysql://site:pwdhash@localhost:3306/my_db');
const Project = patio.addModel('projects').oneToMany('jobs');
const Job = patio.addModel('jobs').manyToOne('projects').oneToMany('stages');
const Stage = patio.addModel('stages').manyToOne('jobs');

Project.save({
  name: 'test',
  jobs: [{
    blockNumber: 'P1300',
    quantity: 1,
    dimensions: '3x2x1',
    material: '1730',
    grind: 'FG',
    stages: [{
       name: 'design',
       complete: false
    }]
  }]
}).chain(console.log, console.log);

The following error is produced:

QueryError : ER_NO_REFERENCED_ROW_2: Cannot add or update a child row: a foreign key constraint fails ("my_db"."jobs", CONSTRAINT "jobs_ibfk_1" FOREIGN KEY ("project") REFERENCES "projects" ("id") ON DELETE CASCADE ON UPDATE CASCADE): INSERT INTO "jobs" ("blockNumber", "quantity", "dimensions", "material", "grind") VALUES ('P1300', 1, '3x2x1', '1730', 'FG')

Any ideas on a cause & solution?

[Lucas Savva]

After doing more than a half effort read of the documentation... 😓

key : foreignKey in current model's table that references associated model's primary key. Defaults to : "{tableName}Id".

Now that that's sorted, is there a limit on how many elements this can take? I'm trying to add ~694 elements (10 stages in 63 jobs) and it is silently failing. I know the data is alright because the method I was using before I found this worked fine.

[Dustin Smith]

I don't think Patio enforces a limit. You may run into a memory issue but I would expect some sort of error.

The error handler is not being called?

[Lucas Savva]

I'm actually not too sure. I put a little console.log in the callback functions (success & error) and both are triggered. In the case of the error callback however the object appears to be empty?

I hand wrote a test entry with 1 value for each table (nested under the first) and it still fails. Only the project is inserted.

[Dustin Smith]

I have never tried doing deeply nested object like that. @doug-martin would you expect it to work? Any ideas?

[Dustin Smith]

Did you sync() your models? http://c2fo.io/patio/models.html

[Lucas Savva]

Yeah I did in my test.... Here's the new code

That shouldn't work at all. It should fail because I have unique columns set up that would mean the same job and stage can't be added twice or 3 times. The database ends up with one entry in each.

Since it does work however, I'll probably use this solution for now, so while I'm at it I have a quick quesiton - do I actually need error handlers in all the places I put console.log?

[Dustin Smith]

No, the error should bubble up to the top level. So having an error handler at the top level should be fine.