Get nested associated records in Laravel 5.1 - php

Question

I have three Database Tables.
CREATE TABLE `tblprojecttype` (
`ProjectTypeID` int(11) NOT NULL,
`ProjectType` varchar(30) NOT NULL,
`Description` varchar(500) NOT NULL,
`IsActive` tinyint(1) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `tblprojecttypecurrencyprice` (
`ProjectTypeCurrencyID` int(11) NOT NULL,
`CurrencyID` int(11) NOT NULL,
`ProjectTypeID` int(11) NOT NULL,
`Price` decimal(10,0) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `tblcurrency` (
`CurrencyID` int(11) NOT NULL,
`Currency` varchar(100) NOT NULL,
`IsActive` tinyint(1) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Models
class Currency_Model extends Model
{
protected $table = "tblcurrency";
protected $primaryKey = "CurrencyID";
public $timestamps = false;
}
class ProjectType_Model extends Model
{
protected $table = "tblprojecttype";
protected $primaryKey = "ProjectTypeID";
public $timestamps = false;
public function projecttypecurrencyprice()
{
return $this->hasOne('\App\Models\ProjectTypeCurrencyPrice_Model',
"ProjectTypeID");
}
}
class ProjectTypeCurrencyPrice_Model extends Model
{
protected $table = "tblprojecttypecurrencyprice";
protected $primaryKey = "ProjectTypeCurrencyID";
public $timestamps = false;
public function Currency()
{
return $this->hasOne('\App\Models\Currency_Model', "CurrencyID");
}
}
There is CurrencyID relationship and ProjectTypeID relationship
What I am trying ?
In my Laravel 5.1 code, I am trying to achive below sql statement so that I can get projecttypecurrencyprice records for each ProjectType record. Finally it should also show records from currency Table for each projecttypecurrencyprice record
$ProjectTypes = \App\Models\project\ProjectType\ProjectType_Model
::with("projecttypecurrencyprice")
->with("projecttypecurrencyprice.Currency")
->get();
What's the Problem ?
I am not able to get Currency records for each projecttypecurrencyprice record.

Answer 1

For ProjectTypeCurrencyPrice_Model you should change Currency relationship this way:
public function Currency()
{
return $this->belongsTo('\App\Models\Currency_Model', "CurrencyID");
}
because you have CurrencyId column in tblprojecttypecurrencyprice and you don't have any connection to ProjectTypeCurrencyPrice_Model in tblcurrency.
And to get data instead of:
$ProjectTypes = \App\Models\project\ProjectType\ProjectType_Model
::with("projecttypecurrencyprice")
->with("projecttypecurrencyprice.Currency")
->get();
you can omit 1st with:
$ProjectTypes = \App\Models\project\ProjectType\ProjectType_Model
::with("projecttypecurrencyprice.Currency")
->get();
By the way if you start this project, you should consider changes in your database structure and read about PSR in PHP - you should rather not use ProjectTypeCurrencyPrice_Model as your model name if you really don't have to, same for ProjectTypeID columns in MySQL