symfony - build form for tables with many relations -

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i have got problem build forms many relations between tables. structure of relations can see on below picture:relations between tables

my relations in yml:

######### products.orm.yml #########     type: entity    table: products    fields:    ...    lifecyclecallbacks: {  }    onetomany:    productcombinations:       targetentity: productscombinations       mappedby: product  ######### productscombinations.orm.yml #########     type: entity    table: products_combinations    fields:    ...    lifecyclecallbacks: {  }    onetomany:       productattributes:         targetentity: productsattributesjoin         mappedby: productcombinations    manytoone:       product:         targetentity: products         inversedby: productcombinations         joincolumn:           name: product_id           referencedcolumnname: id  ######### productsattributesjoin.orm.yml ########  type: entity table: null fields:     combinationid:         type: bigint         column: combination_id         id: true         generator:             strategy: none     attributeid:         type: bigint         id: true         generator:             strategy: none         column: attribute_id lifecyclecallbacks: {  } manytoone:     productcombinations:       targetentity: productscombinations       inversedby: productattributes       joincolumn:         name: combination_id         referencedcolumnname: combination_id     attributes:       targetentity: attributes       inversedby: productattributesjoin       joincolumn:         name: attribute_id         referencedcolumnname: id  ######### attributes.orm.yml #########     type: entity    table: products_attributes    fields:    ...    lifecyclecallbacks: {  }    onetomany:       productattributesjoin:         targetentity: productsattributesjoin         mappedby: attributes    manytoone:        productattributesdefinitions:          targetentity: attributesdefinitions          inversedby: productattributes          joincolumn:            name: attribute_id            referencedcolumnname: id  ######### attributesdefinitions.orm.yml #########     type: entity    table: products_attributes_definitions    fields:    ...    lifecyclecallbacks: {  }    onetomany:       productattributes:         targetentity: attributes         mappedby: productattributesdefinitions    manytoone:        productattributesdefinitions:          targetentity: attributesdefinitions          inversedby: productattributes          joincolumn:            name: attribute_id            referencedcolumnname: id

what have got know that: epos_wrong

what not working when click add new got popup fields productscombinations when fill them in , press save showing error product_id null (but should take products).

also that: enter image description here

also bit of code admin directory:

###### productsview.php ######  $formmapper->with('attributes')             ->add('productcombinations',  'sonata_type_collection')         ->end()  ###### productscombinations.php ######      $formmapper         ->with('general')             ->(some main fields productcombinations)             ->add('productattributes', 'sonata_type_collection', array(), array(             'edit' => 'inline',             'inline' => 'table',             'sortable'  => 'position'         ))  ###### productsattributesjoin.php ######      $formmapper         ->with('general')             ->add('attributes', 'sonata_type_model')         ->end()     ;

for first part, in product entity, have addproductcombinations method. make so:

public function addproductcombinations($object) {     $this->productcombinations[] = $object;     $object->setproduct($this); // line important. }

this should moving. alternatively, can set product inside prepersist / preupdate actions in admin.

the second part of question bit unclear. want have attributes of different types text / choice / multiple choice? if so, have dynamically modify form using how dynamically modify forms using form events. hey, maybe can reuse existing bundles, packagist: assortment.


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