Fix index names in migrations

This can be reverted when we upgrade to Laravel 5.7.

extensions/tags/migrations/2015_10_19_061223_make_slug_unique.php

@@ -9,21 +9,26 @@
  * file that was distributed with this source code.
  */
 
+use Flarum\Database\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Database\Schema\Builder;
 
 return [
     'up' => function (Builder $schema) {
-        $schema->table('tags', function (Blueprint $table) {
+        $schema->table('tags', function (Blueprint $table) use ($schema) {
             $table->string('slug', 100)->change();
             $table->unique('slug');
+
+            Migration::fixIndexNames($schema, $table);
         });
     },
 
     'down' => function (Builder $schema) {
-        $schema->table('tags', function (Blueprint $table) {
+        $schema->table('tags', function (Blueprint $table) use ($schema) {
             $table->string('slug', 255)->change();
-            $table->dropUnique('tags_slug_unique');
+            $table->dropUnique(['slug']);
+
+            Migration::fixIndexNames($schema, $table);
         });
     }
 ];

extensions/tags/migrations/2018_06_27_085300_change_tags_add_foreign_keys.php

@@ -9,6 +9,7 @@
  * file that was distributed with this source code.
  */
 
+use Flarum\Database\Migration;
 use Illuminate\Database\Query\Expression;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Database\Schema\Builder;
@@ -30,16 +31,20 @@ return [
             'last_posted_discussion_id' => $select('id', 'discussions', 'last_posted_discussion_id'),
         ]);
 
-        $schema->table('tags', function (Blueprint $table) {
+        $schema->table('tags', function (Blueprint $table) use ($schema) {
             $table->foreign('parent_id')->references('id')->on('tags')->onDelete('set null');
             $table->foreign('last_posted_user_id')->references('id')->on('users')->onDelete('set null');
             $table->foreign('last_posted_discussion_id')->references('id')->on('discussions')->onDelete('set null');
+
+            Migration::fixIndexNames($schema, $table);
         });
     },
 
     'down' => function (Builder $schema) {
-        $schema->table('tags', function (Blueprint $table) {
+        $schema->table('tags', function (Blueprint $table) use ($schema) {
             $table->dropForeign(['parent_id', 'last_posted_discussion_id', 'last_posted_user_id']);
+
+            Migration::fixIndexNames($schema, $table);
         });
     }
 ];

extensions/tags/migrations/2018_06_27_100200_change_tag_user_add_foreign_keys.php

@@ -9,6 +9,7 @@
  * file that was distributed with this source code.
  */
 
+use Flarum\Database\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Database\Schema\Builder;
 
@@ -26,15 +27,19 @@ return [
             })
             ->delete();
 
-        $schema->table('tag_user', function (Blueprint $table) {
+        $schema->table('tag_user', function (Blueprint $table) use ($schema) {
             $table->foreign('tag_id')->references('id')->on('tags')->onDelete('cascade');
             $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
+
+            Migration::fixIndexNames($schema, $table);
         });
     },
 
     'down' => function (Builder $schema) {
-        $schema->table('tag_user', function (Blueprint $table) {
+        $schema->table('tag_user', function (Blueprint $table) use ($schema) {
             $table->dropForeign(['tag_id', 'user_id']);
+
+            Migration::fixIndexNames($schema, $table);
         });
     }
 ];

extensions/tags/migrations/2018_06_27_103100_add_discussion_tag_foreign_keys.php

@@ -9,6 +9,7 @@
  * file that was distributed with this source code.
  */
 
+use Flarum\Database\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Database\Schema\Builder;
 
@@ -26,15 +27,19 @@ return [
             })
             ->delete();
 
-        $schema->table('discussion_tag', function (Blueprint $table) {
+        $schema->table('discussion_tag', function (Blueprint $table) use ($schema) {
             $table->foreign('discussion_id')->references('id')->on('discussions')->onDelete('cascade');
             $table->foreign('tag_id')->references('id')->on('tags')->onDelete('cascade');
+
+            Migration::fixIndexNames($schema, $table);
         });
     },
 
     'down' => function (Builder $schema) {
-        $schema->table('discussion_tag', function (Blueprint $table) {
+        $schema->table('discussion_tag', function (Blueprint $table) use ($schema) {
             $table->dropForeign(['discussion_id', 'tag_id']);
+
+            Migration::fixIndexNames($schema, $table);
         });
     }
 ];