create offerings and its migration

src/Entity/Offering.php

@@ -0,0 +1,93 @@
+<?php
+
+namespace App\Entity;
+
+use App\Repository\OfferingRepository;
+use Doctrine\ORM\Mapping as ORM;
+
+/**
+ * @ORM\Entity(repositoryClass=OfferingRepository::class)
+ */
+class Offering
+{
+    /**
+     * @ORM\Id
+     * @ORM\GeneratedValue
+     * @ORM\Column(type="integer")
+     */
+    private $id;
+
+    /**
+     * @ORM\ManyToOne(targetEntity=User::class, inversedBy="offerings")
+     * @ORM\JoinColumn(nullable=false)
+     */
+    private $byUser;
+
+    /**
+     * @ORM\Column(type="datetime")
+     */
+    private $createdAt;
+
+    /**
+     * @ORM\Column(type="string", length=255)
+     */
+    private $title;
+
+    /**
+     * @ORM\Column(type="string", length=255, nullable=true)
+     */
+    private $photoFilename;
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getByUser(): ?User
+    {
+        return $this->byUser;
+    }
+
+    public function setByUser(?User $byUser): self
+    {
+        $this->byUser = $byUser;
+
+        return $this;
+    }
+
+    public function getCreatedAt(): ?\DateTimeInterface
+    {
+        return $this->createdAt;
+    }
+
+    public function setCreatedAt(\DateTimeInterface $createdAt): self
+    {
+        $this->createdAt = $createdAt;
+
+        return $this;
+    }
+
+    public function getTitle(): ?string
+    {
+        return $this->title;
+    }
+
+    public function setTitle(string $title): self
+    {
+        $this->title = $title;
+
+        return $this;
+    }
+
+    public function getPhotoFilename(): ?string
+    {
+        return $this->photoFilename;
+    }
+
+    public function setPhotoFilename(?string $photoFilename): self
+    {
+        $this->photoFilename = $photoFilename;
+
+        return $this;
+    }
+}

src/Entity/User.php

@@ -3,6 +3,8 @@
 namespace App\Entity;
 
 use App\Repository\UserRepository;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 use Symfony\Component\Security\Core\User\UserInterface;
@@ -47,6 +49,16 @@ class User implements UserInterface
      */
     private $username;
 
+    /**
+     * @ORM\OneToMany(targetEntity=Offering::class, mappedBy="byUser", orphanRemoval=true)
+     */
+    private $offerings;
+
+    public function __construct()
+    {
+        $this->offerings = new ArrayCollection();
+    }
+
     public function getId(): ?int
     {
         return $this->id;
@@ -146,4 +158,34 @@ class User implements UserInterface
 
         return $this;
     }
+
+    /**
+     * @return Collection|Offering[]
+     */
+    public function getOfferings(): Collection
+    {
+        return $this->offerings;
+    }
+
+    public function addOffering(Offering $offering): self
+    {
+        if (!$this->offerings->contains($offering)) {
+            $this->offerings[] = $offering;
+            $offering->setByUser($this);
+        }
+
+        return $this;
+    }
+
+    public function removeOffering(Offering $offering): self
+    {
+        if ($this->offerings->removeElement($offering)) {
+            // set the owning side to null (unless already changed)
+            if ($offering->getByUser() === $this) {
+                $offering->setByUser(null);
+            }
+        }
+
+        return $this;
+    }
 }