FEATURE #1423: add uploading of title photo for content pages

database/migrations/2016_03_31_192238_ChangeContentTitleImageIdForFilename.php

@@ -0,0 +1,86 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+class ChangeContentTitleImageIdForFilename extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+
+        try {
+            Schema::table('contents', function (Blueprint $table) {
+                $table->dropForeign('fk_content_file1');
+            });
+        } catch (\Illuminate\Database\QueryException $e) {
+            // probably foreign does not exist, try to remove one from migration
+
+            try {
+                Schema::table('contents', function (Blueprint $table) {
+                    $table->dropForeign('contents_title_photo_foreign');
+                });
+            } catch (\Illuminate\Database\QueryException $ex) {
+                // ignore this error
+            }
+        }
+
+        // force Doctrine to consider enum type as string
+        $platform = Schema::getConnection()
+                          ->getDoctrineSchemaManager()
+                          ->getDatabasePlatform();
+        $platform->registerDoctrineTypeMapping('enum', 'string');
+
+        Schema::table('contents', function (Blueprint $table) {
+            $table->string('title_photo', 128)
+                  ->nullable()
+                  ->default(null)
+                  ->comment('This photo is supposed to be displayed e.g. on list of all pages.')
+                  ->change();
+
+            $table->foreign('title_photo')
+                  ->references('filename')
+                  ->on('files')
+                  ->onUpdate('cascade')
+                  ->onDelete('set null');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        // force Doctrine to consider enum type as string
+        $platform = Schema::getConnection()
+                          ->getDoctrineSchemaManager()
+                          ->getDatabasePlatform();
+        $platform->registerDoctrineTypeMapping('enum', 'string');
+
+        // delete all title photos
+        DB::statement('UPDATE contents SET title_photo = NULL');
+        
+        Schema::table('contents', function (Blueprint $table) {
+            $table->dropForeign('contents_title_photo_foreign');
+        });
+
+        Schema::table('contents', function (Blueprint $table) {
+            $table->integer('title_photo', false)
+                  ->change();
+        });
+
+        Schema::table('contents', function (Blueprint $table) {
+            $table->foreign('title_photo')
+                  ->references('id')
+                  ->on('files');
+        });
+    }
+}