Laravel saving foreign key in another table - php

Question

What is the best approach to save the stream_id as a foreign key inside the junk table
I already created the tables both tables.
Migration:
public function up()
{
Schema::table('junk', function(Blueprint $table)
{
$table->integer('stream_id')->after('id')->unsigned();
});
}
Controller function:
public function create(Request $request)
{
// create junk, junk shall contain the stream id as a foreign key (save in database)
$junk = new Junk();
// stream information data -> the data is saved correctly here
$data = $request->all();
$stream = new Stream();
$stream->fill($data);
if($stream->save())
{
return redirect()->route('stream.new')->with('success', 'saved.');
}
else
{
return redirect()->route('stream.new')->with('error', 'not saved.')->withInput();
}
}
My Junk Model:
public function junk()
{
return $this->belongsTo('Stream', 'junk_id');
}
My Stream Model
public function stream()
{
return $this->belongsTo('Junk', 'stream_id');
}

Answer 1

Do you want to use foreign key contraints? If so, You might take this approach. Here is an example of a location table that has a foreign key to the coordinates:
public function up()
{
Schema::enableForeignKeyConstraints();
Schema::create('location', function (Blueprint $table) {
$table->engine = 'InnoDB';
$table->uuid('id');
$table->primary('id');
$table->uuid('coordinate_id')->nullable();
$table->string('address')->nullable();
$table->string('city')->nullable();
$table->string('state')->nullable();
$table->string('zipcode')->nullable();
$table->timestamps();
});
Schema::table('location', function(Blueprint $table){
$table->foreign('coordinate_id')->references('id')->on('coordinate');
});
}
There is no reference to the location on the coordinate table.
You should not be assigning $data = $request->all(); you should be using Validator class to protect yourself from mass assignment issues.
It would also be nice to see your Junk class.

Answer 2

If you have the functions to relacionate the models, you can make this:
$junk = new Junk();
$junk->stream()->associate($request->all());
In the relationship:
One to Many, uses the associate() method
Many To Many, uses the attach() method
For more information about the relations in Laravel (Eloquent ORM)
https://laravel.com/docs/5.4/eloquent-relationships#inserting-and-updating-related-models