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;
+    }
+}