Foreign Key constraint when inserting rows in table - mysql

Question

I have an error while trying to insert some rows in a table. It's an association problem between my entities but I don't know how to solve it.
banque_statistiquecolle table is empty and I can't insert any row, banque_colle contains some rows. Rows I'm trying to insert are linked to these banque_colle rows.
Query :
INSERT INTO banque_statistiquecolle (id, colle_id, effectif, moyenne, mediane, note100, major, minor)
SELECT sc.id, sc.colle_id, sc.effectif, sc.moyenne, sc.mediane, sc.note100, sc.major, sc.minor
FROM statistiquecolle_groupe scg
LEFT JOIN statistiquecolle sc ON sc.id = scg.statistiquecolle_id
WHERE scg.groupe_id = 1
AND sc.id NOT IN (SELECT sc1.id
FROM statistiquecolle_groupe scg1
LEFT JOIN statistiquecolle sc1 ON sc1.id = scg1.statistiquecolle_id
WHERE scg1.groupe_id != 1)
The error :
SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row:
a foreign key constraint fails ('tutotour_tharmo18052017test'.'banque_statistiquecolle',
CONSTRAINT 'FK_5C1250C5F0B40A43' FOREIGN KEY ('colle_id') REFERENCES 'banque_colle' ('id'))
BanqueStatistiqueColle Entity :
/**
* BanqueStatistiqueColle
*
* #ORM\Table(name="banque_statistiquecolle")
* #ORM\Entity
*/
class BanqueStatistiqueColle
{
/**
* #var integer
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\ManyToOne(targetEntity="\PACES\BanqueBundle\Entity\BanqueColle")
* #ORM\JoinColumn(name="colle_id", referencedColumnName="id")
*/
private $colle;
{Other properties}
/**
* #ORM\OneToMany(targetEntity="\PACES\BanqueBundle\Entity\BanqueRepartitionColle", mappedBy="idStatColle",
* cascade={"all"})
*/
private $repartitionsColle;
BanqueColle Entity :
/**
* Colle
*
* #ORM\Table(name="banque_colle")
* #ORM\Entity
* #ORM\InheritanceType("JOINED")
* #ORM\DiscriminatorColumn(name="discr", type="string")
* #ORM\DiscriminatorMap({"colle"="BanqueColle", "colleQC"="BanqueColleQC"})
*/
class BanqueColle
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
{Other properties}
/**
* #ORM\OneToMany(targetEntity="PACES\BanqueBundle\Entity\BanqueStatistiqueColle", mappedBy="colle", cascade={"all"})
*/
protected $statsColle;

Answer 1

The error is self explanatory
Integrity constraint violation: 1452 Cannot add or update a child row:
a foreign key constraint fails
When two table are binded with foreign key relationship, in that case you can only insert those values in child table which are already present in parent table.
Your foreign key relation is:
FOREIGN KEY ('colle_id') REFERENCES 'banque_colle' ('id'))
so you can insert only those value in colle_id which are already their in 'banque_colle' ('id')) column.