Merge branch 'feature/add-morph-to-relationship' into 2.x

Author: likeadeckofcards

src/Database/Eloquent/Concerns/FMHasRelationships.php

@@ -6,6 +6,7 @@
 use GearboxSolutions\EloquentFileMaker\Database\Eloquent\Relations\BelongsTo;
 use GearboxSolutions\EloquentFileMaker\Database\Eloquent\Relations\HasMany;
 use GearboxSolutions\EloquentFileMaker\Database\Eloquent\Relations\HasOne;
+use GearboxSolutions\EloquentFileMaker\Database\Eloquent\Relations\MorphTo;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Concerns\HasRelationships;
 use Illuminate\Database\Eloquent\Model;
@@ -133,6 +134,22 @@ public function morphMany($related, $name, $type = null, $id = null, $localKey =
         return $this->newMorphMany($instance->newQuery(), $this, $type, $id, $localKey);
     }
 
+    /**
+     * Instantiate a new MorphTo relationship. Normally we would handle the resolution of the method here,
+     * but we don't know yet if the related Modal is an FMModel or Eloquent model. We will let the FM MorphTo
+     * class handle it.
+     *
+     * @param  string  $foreignKey
+     * @param  string  $ownerKey
+     * @param  string  $type
+     * @param  string  $relation
+     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
+     */
+    protected function newMorphTo(Builder $query, Model $parent, $foreignKey, $ownerKey, $type, $relation)
+    {
+        return new MorphTo($query, $parent, $foreignKey, $ownerKey, $type, $relation);
+    }
+
     /**
      * Instantiate a new HasOne relationship.
      *

src/Database/Eloquent/Relations/MorphTo.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace GearboxSolutions\EloquentFileMaker\Database\Eloquent\Relations;
+
+use GearboxSolutions\EloquentFileMaker\Database\Eloquent\FMModel;
+use Illuminate\Database\Eloquent\Relations\MorphTo as BaseMorphTo;
+
+class MorphTo extends BaseMorphTo
+{
+    /**
+     * Get all of the relation results for a type.
+     *
+     * @param  string  $type
+     * @return \Illuminate\Database\Eloquent\Collection
+     */
+    protected function getResultsByType($type)
+    {
+        $instance = $this->createModelByType($type);
+
+        if (! ($instance instanceof FMModel)) {
+            return parent::getResultsByType($type);
+        }
+
+        $ownerKey = $this->ownerKey ?? $instance->getKeyName();
+
+        $query = $this->replayMacros($instance->newQuery())
+            ->mergeConstraintsFrom($this->getQuery())
+            ->with(array_merge(
+                $this->getQuery()->getEagerLoads(),
+                (array) ($this->morphableEagerLoads[get_class($instance)] ?? [])
+            ))
+            ->withCount(
+                (array) ($this->morphableEagerLoadCounts[get_class($instance)] ?? [])
+            );
+
+        if ($callback = ($this->morphableConstraints[get_class($instance)] ?? null)) {
+            $callback($query);
+        }
+
+        $whereIn = $this->whereInMethod($instance, $ownerKey);
+
+        return $query->{$whereIn}(
+            $ownerKey, $this->gatherKeysByType($type, $instance->getKeyType())
+        )->get();
+    }
+}