Can anyone tell the difference between find and findOne in yii2?

I've searched too much but stil do not understand the problem with the code above.

        $this->_entity_model = $entity_class_name::findOne(['service_request ' => $this->id]);
        $t = $entity_class_name::find()->where(['service_request ' => $this->id])->one();


        var_dump(isset($this->_entity_model));
        var_dump(isset($t));
        exit;

as you can see I've two queries, one with find and the other one with findOne. Problem is : the first var_dump return false! the second true ? I do not figure out how this can be possible ?

with the first query I get

'Key "service_request " is not a column name and can not be used as a filter'.

But the second is returning well(true) the result.

$this->id is 127

Update :

 $this->_entity_model = $entity_class_name::find()->where(['service_request' => $this->id])->one();

I now can use this but i get error below: Invalid argument supplied for foreach()

my rules

<?php

namespace app\models;

use app\components\Defaults;
 use Yii;

class IndividualTrader extends Entreprise
{ 
   const PROCESSING_IFU = 'processing_ifu';

public static function model($className = __CLASS__)
{
    return parent::model($className);
}

public function rules()
{
    return array_merge(parent::rules(),
        [
            [['service_request','integer']],
            [['emplois_generes','ca'], 'required', 'on' => self::SCENARIO_FORM],
            [['identifiant_fiscal'], 'required', 'on' => self::PROCESSING_IFU],
            [['activite'], 'required', 'on' => self::SCENARIO_ACTIVITY],
            [['forme_juridique'], 'default', 'value' => FormeJuridique::PP],
            [['emplois_generes'], 'number', 'min' => 0],

            [['objet_social'], 'default', 'value' => ''],
          //  [['identifiant_fiscal, activite, ville_taxe_professionnelle'], 'required', 'on' => 'fisc'],
            [['raison_sociale', 'identifiant_fiscal', 'registre_commerce'], 'unique'],
            /*[['has_nationalite'],'safe','on'=>self::SCENARIO_GUIDE],*/
            [['registre_commerce_declare', 'date_rc'], 'validateRequiredRegistrationData', 'registration_attribute' => 'has_already_registered_rccm', 'validate_if_value' => 1, 'on' => self::SCENARIO_FORM],
            [['telephone'], 'ext.LPNValidator.LPNValidator', 'defaultCountry' => Defaults::COUNTRY_PHONE_CODE, 'on' => self::SCENARIO_CONTACT],
            [['prenom_contact', 'nom_contact', 'telephone', 'email'], 'required', 'on' => self::SCENARIO_CONTACT],
            [['activite'], 'required', 'on' => self::SCENARIO_FORM],
            [['activite_secondaire'], 'compare', 'compareAttribute' => 'activite', 'operator' => '!=', 'message' => Yii::t('app', "{compareAttribute} and {attribute} must not be equal"), 'on' => self::SCENARIO_FORM],
            [['trade_name,company_name'], 'safe', 'on' => TradeNameSearch::SCENARIO_TRADE_NAME_SEARCH]
        ]
    );
}

public function init()
{
    parent::init();
    // initialize attributes with default values
    $this->debut_activite = date('d-m-Y');
    $this->forme_juridique = FormeJuridique::PP;
    $this->date_fin_activite = '31-12';
    $this->duree_activite = 99;
}

public function isCitizen()
{
    return $this->has_nationalite == 1;
}

public function isForeign()
{
    return isset($this->has_nationalite) && $this->has_nationalite == 0;
}

public function hasRegisteredRccm()
{
    return $this->has_already_registered_rccm == 0;
}

public function needsToProveAddress()
{
    return $this->has_director_different_address == 1;
}

public function getTotalSalaries()
{
    return intval($this->emplois_generes) + intval($this->emplois_etrangers);
}

public function isActivityAuthorizationRequired()
{
    return isset($this->is_activity_auth_needed) && $this->is_activity_auth_needed == 1;
}

public function isSpecialActivity()
{
    return (isset($this->is_activity_auth_needed) && $this->is_activity_auth_needed == 1) || (isset($this->is_import) && $this->is_import == 1);
}

public function hasCNI()
{
    return !isset($this->ppCommercant, $this->ppCommercant->type_piece_identite) ? false : ($this->ppCommercant->type_piece_identite == TypePieceIdentite::CNI);
}

public function getPrimaryAddress()
{
    $adres = (new Adresse())->findByAttributes(array('entreprise' => $this->id, 'type_adresse' => TypeAdresse::PRIMARY_ADDRESS));
    return ($adres->same_address_pp == 0) ? $this->getSecondaryAddress() : $adres;
}

public function getSecondaryAddress()
{
    return (new Adresse())->findByAttributes(array('entreprise' => $this->id, 'type_adresse' => TypeAdresse::SECONDARY_ADDRESS));
}

public function getInlinePrimaryAddress()
{
    $address = $this->getPrimaryAddress();
    return !isset($address) ? '' : $address->getInlineAdresse();
}


public function isPP()
{
    return true;
}

public function getRccmViewName()
{
    return '_pp';
}

/**
 * @param $name
 * @param string $operator
 * @return CDbCriteria
 */

public function getFullNameCriteria($name, $service_request_alias, $operator = 'AND')
{
    $criteria = new CDbCriteria;
    //    $criteria->select = "(select CONCAT(pp.nom , CONCAT('|', CONCAT(pp.prenom ,CONCAT('|',ent.nom_commercial)))) from tbl_personne_physique pp, tbl_entreprise ent where pp.id = ent.pp_commercant and ent.service_request = ".$t.".id) as full_name";
    $full_name = "(select CONCAT(pp.nom , '|' , pp.prenom, '|' ,ent.nom_commercial) from tbl_personne_physique pp, tbl_entreprise ent where pp.id = ent.pp_commercant and ent.service_request = " . $service_request_alias . ".id)";
    $criteria->compare($full_name, $name, true, $operator);
    return $criteria;

}
}

Entreprise

use app\components\Utils;
use app\models\_base\BaseEntreprise;
use app\models\PieceJustificative;
use Yii;
use yii\db\ActiveQuery;

class Entreprise extends BaseEntreprise
{
const WORKFLOW_ID = 'swEntreprise';
const STATUS_DRAFT = 'draft';
const STATUS_DRAFT_CORRECTION = 'draft_correction';
const STATUS_REVISION = 'revision';
const STATUS_REVISION_RETURNED = 'revision_returned';
const STATUS_TRAITEMENT = 'traitement';

// Workflow.
const STATUS_CORRECTION = 'correction';
const STATUS_RETRAIT = 'retrait';
const STATUS_PAIEMENT = 'paiement';
const STATUS_FINISHED = 'finished';
const STATUS_REJECTED = 'rejected';
const STATUS_ROLE_RC = 'role_rc';
const STATUS_ROLE_IF = 'role_if';
const STATUS_ROLE_PATENTE = 'role_patente';
const STATUS_ROLE_CAISSE = 'role_caisse';
const STATUS_VALID = 'valid';
const STATUS_RETURNED = 'returned';
const INSTRUCTION_PENDING = 0;
const INSTRUCTION_VALID = 1;
const INSTRUCTION_REJECTED = 2;
const REGISTRATION_RCCM = "RCCM";
const REGISTRATION_CC = "CC";
const RCCM = "RCCM";
const DGT = "DGT";
const CNSS = "CNSS";
const CARTE = "CARTE";
const ANNONCE = "ANNONCE";
const CNPS = "CNPS";
const DGI_IF = "IFU";
const DGI_TP = "TP";
const AL  ='AL';
const IMPORT = "IMPORT";
// SCENARIOS
const SCENARIO_GUIDE = 'guide';
const SCENARIO_FORM = 'form';
const SCENARIO_CONTACT = 'contact';
const SCENARIO_ACTIVITY_FORM = 'activity_form';
const SCENARIO_ACTIVITY = 'activite';
//DETERMINANTS
const EXPORT = "EXPORT";
const POUVOIR = "POUVOIR";
const MARIE = "MARIE";
const NATIONALITE = "NATIONALITE";
const CNI = "CNI";
const CASIER = "CASIER";
const HONNEUR = "HONNEUR";
const ASSOCIE_PP = "ASSOCIE_PP";
const ASSOCIE_PM = "ASSOCIE_PM";
const AGREMENT = "AGREMENT";
const PLUS = "+";
const MINUS = "-";
const DUREE_ACTIVITE = 99;
const DUREE_IF = 10;
const ONLINE = 1;
const OFFLINE = 2;
const COMMERCANT = 1;
const ENTREPRENANT = 3;
//PARAMS
const SOCIETE = 2;
private static $_role;
public $delai = 0;
/**
 * @var $keyword string
 * @var $name string
 * @var $service string
 */
public $keyword;
public $name;
public $service;
public $inscription;
private $_role_by_status = null;
private $_determinants;
private $_types_pieces;
private $_types_pieces_originaux;
private $_pieces_originaux;
private $_pieces_tobecertified;
private $_formulaires_tobesigned;
private $_is_PP;
private $_deletable;
private $_is_Entreprenant;

public static function model($className = __CLASS__)
{
    return parent::model($className);
}

public function rules()
{
    return array_merge(parent::rules(), [
        [['name', 'service','keyword', 'inscription'], 'safe'],
        //array('cc_titulaire, cc_titulaire_rpt, cc_suppleant, cc_suppleant_rpt', 'length', 'max' => 128),
        [['devise_capital','activite', 'mode_exploitation', 'journal_annonce'], 'string', 'max' => 500],
        [['date_fin_activite'], 'string', 'max' => 20],
        [['debut_activite', 'date_rc'], 'date', 'format' => Yii::$app->formatter->dateFormat, 'message' => Yii::t('app', 'The format of {attribute} is invalid.')],
        //array('exploitant_rccm', 'length', 'max' => 100),
        //array('exploitant_name', 'length', 'max' => 250),
        [['debut_activite'], 'date', 'format' => Yii::$app->formatter->dateFormat, 'message' => Yii::t('app', 'The format of {attribute} is invalid.')],
        [['email'], 'email'],
    ]);
}

public static function getCustomStatuslistData()
{
    return array(
        self::getStatusLbl(self::STATUS_DRAFT) => Yii::t('app', "STATUS_DRAFT"),
        self::getStatusLbl(self::STATUS_ROLE_CAISSE) => Yii::t('app', "STATUS_CAISSE"),
        self::getStatusLbl(self::STATUS_REVISION) => Yii::t('app', "STATUS_REVISION_CUSTOM"),
        self::getStatusLbl(self::STATUS_CORRECTION) => Yii::t('app', "STATUS_CORRECTION"),
        self::getStatusLbl(self::STATUS_ROLE_RC) => Yii::t('app', "STATUS_TRAITEMENT_RC"),
        self::getStatusLbl(self::STATUS_ROLE_IF) => Yii::t('app', "STATUS_TRAITEMENT_IF"),
        self::getStatusLbl(self::STATUS_ROLE_PATENTE) => Yii::t('app', "STATUS_TRAITEMENT_TP"),
        self::getStatusLbl(self::STATUS_RETRAIT) => Yii::t('app', "STATUS_RETRAIT_CUSTOM"),
        self::getStatusLbl(self::STATUS_FINISHED) => Yii::t('app', "STATUS_FINISHED"),
    );
}

Thanks for helping.

Solution

There is one main difference:

Model::findOne() is equal to Model::find()->one().

In your case, you should try with:

$this->_entity_model = $entity_class_name::findOne(['service_request ' => $this->id]);
$t = $entity_class_name::find()->where(['service_request ' => $this->id])->one();


var_dump(isset($this->_entity_model));
var_dump(isset($t));
exit;

What probably happens is, there is no such record in the DB. Your first query sees that and returns null, but your second one returns an ActiveRecord object. One possible mistake I see is the extra space after service_request. Try deleting it, thus making the query:

$this->_entity_model = $entity_class_name::findOne(['service_request' => $this->id]);