Can't store a new row - SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails - mysql

Question

My clients table and users table are child tables of my businesses table. So both the clients and users table contain a business_id column that refers to the id column of the businesses table:
public function up()
{
Schema::create('clients', function(Blueprint $table)
{
$table->increments('id');
$table->integer('business_id')->unsigned();
$table->foreign('business_id')->references('id')->on('businesses');
$table->string('first_name');
$table->string('last_name');
Etc…
I am able to store a new user, it works fine, but I keep getting this error when trying to store a new row into my clients table :
SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or
update a child row: a foreign key constraint fails
(laravel.clients, CONSTRAINT clients_business_id_foreign FOREIGN
KEY (business_id)
Client.php model
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = ['business_id', 'first_name', 'last_name'];
/**
* Business where this user works.
*
* #return \Illuminate\Database\Eloquent\Relations\BelongsTo
*/
public function businesses()
{
return $this->belongsTo('App\Business');
}
Business.php model
/**
* Clients that use this business.
*
* #return \Illuminate\Database\Eloquent\Relations\HasMany
*/
public function clients()
{
return $this->hasMany('App\Client','business_id');
}
ClientsController.php
public function store(ClientsRequest $request)
{
var_dump(Auth::user()->business_id);
$clientinfo = Request::all();
Client::create($clientinfo);
$client = new Client;
$client->business_id = Auth::user()->business_id;
$client->first_name = $clientinfo['first_name'];
$client->last_name = $clientinfo['last_name'];
//$client->save();
$business->clients()->save($client);
$last_inserted_id = $data->id;
return redirect('clients/'.$last_inserted_id.'/edit');
The only thing I’m not sure is the way I’m retrieving the business_id (from the users table), via Auth. When I var_dump that value, I get :
string(1) "7"
I know the id value is 7 in my businesses table, that’s what I’m looking for, but not sure if it should be converted to integer.
And, not sure if I have to save using :
$client->save();
Or
$business->clients()->save($client);
Thanks

Answer 1

Both following are correct ways, but first one is more Laravel than later,
public function store(ClientsRequest $request)
{
$client = new Client([
'first_name' => $request->get('first_name'),
'last_name' => $request->get('last_name'),
]);
$client = Business::findOrFail(Auth::user()->business_id)
->clients()
->save($client);
return redirect('clients/'.$client->id.'/edit');
}
P.S. above business_id will be automatically added to client by Eloquent
Other way is like you did, where you are inserting a business_id manually.
public function store(ClientsRequest $request)
{
$clientinfo = Request::all();
$client = Client::create([
'business_id' => Auth::user()->business_id;
'first_name' => $clientinfo['first_name'];
'last_name' => $clientinfo['last_name'];
]);
return redirect('clients/'.$client->id.'/edit');
}
You are receiving error because of following statement in your code,
Client::create($clientinfo);
Above statement will attempt to create a database entry without business_id which is a foreign key and should be supplied but wasn't and hence error.
And you don't have to worry about type-conversion between int<->string, PHP is very good at it.
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