replace gridcol object to json array in db

src/Mine/SeekerBundle/Entity/GridRow.php

@@ -2,7 +2,6 @@
 
 namespace Mine\SeekerBundle\Entity;
 
-use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\ORM\Mapping as ORM;
 
 /**
@@ -31,20 +30,12 @@ class GridRow
     private $grid;
 
     /**
-     * @var GridCol
+     * @var array
      *
-     * @ORM\OneToMany(targetEntity="Mine\SeekerBundle\Entity\GridCol", mappedBy="gridCol", cascade={"persist"})
-     * @ORM\JoinColumn(name="grid_row", referencedColumnName="id", onDelete="CASCADE")
+     * @ORM\Column(name="grid_col", type="json_array", nullable=false)
      */
     private $gridCol;
 
-    /**
-     * Constructor
-     */
-    public function __construct()
-    {
-        $this->gridCol = new ArrayCollection();
-    }
 
     /**
      * Get id
@@ -57,33 +48,23 @@ class GridRow
     }
 
     /**
-     * Add gridCol
+     * Set gridCol
      *
-     * @param GridCol $gridCol
+     * @param array $gridCol
      *
      * @return GridRow
      */
-    public function addGridCol(GridCol $gridCol)
+    public function setGridCol($gridCol)
     {
-        $this->gridCol[] = $gridCol;
+        $this->gridCol = $gridCol;
 
         return $this;
     }
 
-    /**
-     * Remove gridCol
-     *
-     * @param GridCol $gridCol
-     */
-    public function removeGridCol(GridCol $gridCol)
-    {
-        $this->gridCol->removeElement($gridCol);
-    }
-
     /**
      * Get gridCol
      *
-     * @return \Doctrine\Common\Collections\Collection
+     * @return array
      */
     public function getGridCol()
     {