Laravel 5 - Override Get or Select from Eloquent - php

Question

Is it possible to override the ->get() methods from Eloquent in order to always customize the output of the selected fields from the DB query?
For example, if you do a usual Eloquent query like:
User::where('email','like','%wherever.com')->get();
Instead of it making the query:
Select name, email, address, created_at from users where email like '%wherever.com'
Is it possible to override the method to always return something like:
Select CONCAT('CL::',name), lower(email), address, created_at from users where email like '%wherever.com'
I ask for ->get because I have seen that I can pass an array with the columns to be selected but I don't want to define them on all queries.

Answer 1

So, after digging around the functions regarding the query I found this solution:
I created a new class CustomQueryBuilder that extends the Illuminate\Database\Query\Builder
There you can override the get() / select() / where() methods from Eloquent.
Then, in the models that you want to change the way the query is made, define the fields to change like:
protected $encrypted = [
'name',
'email',
];
After this, I created a new class CustomModel that extends the Illuminate\Database\Eloquent\Model and there override the newBaseQueryBuilder like this:
protected function newBaseQueryBuilder()
{
$connection = $this->getConnection();
return new CustomQueryBuilder(
$connection, $connection->getQueryGrammar(), $connection->getPostProcessor(), $this
);
}
Inside the CustomQueryBuilder you can customise all the methods from builder for your needs.
With this setup, you can in any Illuminate\Database\Eloquent\Model change it to extend your CustomModel and inherit this special behaviour for the designated columns.
Be aware that all queries made from Models extending your CustomModel will get this new methods, so do all the needed checks to don't mess up with Eloquent normal behaviour, something like this:
public function where($column, $operator = null, $value = null, $boolean = 'and')
{
if ($this->model !== null && isset($this->model::$encrypted))
{
if (in_array($column, $this->model::$encrypted))
{
$column = DB::raw("CONCAT('CL::',$column)");
}
}
parent::where($column, $operator, $value, $boolean);
}
PS: I know this sound silly with the CONCAT example but with the property $encrypted you can figure out that it's not for concatenating string.

Answer 2

You can use model to update the result for the specific field like below
Use this code in your model file to contact CL::' with thename` value
public function getNameAttribute($value) {
return 'CL::'.$value;
}
You can just call User::where('email','like','%wherever.com')->get(); like this
This getNameAttribute function will always return name value with "CL::"
So you don't need to add CONCAT('CL::'.name) with your query.
Same way you can add for other fields also
Updated
Solution when querying the result
Add this geofields in your model
protected $geofields = array("concat('CL::',name) as name");
Add this newQuery function to override the columns
public function newQuery($excludeDeleted = true)
{
$raw='';
foreach($this->geofields as $column){
$raw .= $column;
}
return parent::newQuery($excludeDeleted)->addSelect('*',\DB::raw($raw));
}
Hope this is what you expect.