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How to extend the default model - Printable Version

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+--- Thread: How to extend the default model (/showthread.php?tid=79315)

How to extend the default model - Zeff - 05-27-2021

Hi friends,

For a specific App, I want to add some extra functionality (a createDropdown() method) to the default model (System\Model - which extends the BaseModel in the same location) so I can use it in all my models. Does someone has a neat / best practise solution for this?

Thanks!

Zeff

RE: How to extend the default model - InsiteFX - 05-27-2021

Just create your own Model that extends the CI Model add your methods to it then extend your new Model
where you use Model.

RE: How to extend the default model - Zeff - 05-27-2021

Thanks InsiteFX!

It's that simple... I still have to get used to the new way of coding in CI4.
I've shared my code for my 'BaseModel' in App\Models, maybe I can be helpfull for others...

PHP Code:
<?php namespace App\Models;

use CodeIgniter\Model;

class BaseModel extends Model
{
    /**
     * Produces array to generate form elements easily, eg. SELECT elements (key/id => value pairs), RADIO or CHECKBOX iterations
     * 
     * @param string $field      # Which field to use as value (primary key is used as key)
     * @param bool $addHeader    # Add a first array element with empty key and a '__Please select' value
     * @param string $headerText # custom header text (if you do not want to use the custom '__Please select)
     * @return array
     */
    public function dropdown(string $field, bool $addHeader=TRUE, string $headerText=null)
    {

        $fieldnames = $this->getFieldNames($this->table); // array
        
        if(!isset($field) || !in_array($field, $fieldnames))
                    throw new \Exception("The field `".$field."` does not exist in table `".$this->table."`");
        
        $types = $this->select($this->primaryKey, $field)->asArray()->findAll();
        
        $keys = array_column($types, $this->primaryKey);
        $values = array_column($types, $field);

        // Add empty row ad beginning
        if($addHeader===TRUE)
        {
            array_unshift($keys, '');
            $headerText = (is_null($headerText)) ?  '__Please select...' : '__'.$headerText;
            array_unshift($values, $headerText);
        }
        
        return array_combine($keys, $values);
    }
}