Revert "Remove getHasCompareKey"

This reverts commit e8f390a.

Author: GromNaN

src/Helpers/QueriesRelationships.php

@@ -22,6 +22,7 @@
 use function in_array;
 use function is_array;
 use function is_string;
+use function method_exists;
 use function strpos;
 
 trait QueriesRelationships
@@ -113,14 +114,23 @@ public function addHybridHas(Relation $relation, $operator = '>=', $count = 1, $
             $not = ! $not;
         }
 
-        $key       = $relation instanceof HasOneOrMany ? $relation->getForeignKeyName() : $relation->getOwnerKeyName();
-        $relations = $hasQuery->pluck($key);
+        $relations = $hasQuery->pluck($this->getHasCompareKey($relation));
 
         $relatedIds = $this->getConstrainedRelatedIds($relations, $operator, $count);
 
         return $this->whereIn($this->getRelatedConstraintKey($relation), $relatedIds, $boolean, $not);
     }
 
+    /** @return string */
+    protected function getHasCompareKey(Relation $relation)
+    {
+        if (method_exists($relation, 'getHasCompareKey')) {
+            return $relation->getHasCompareKey();
+        }
+
+        return $relation instanceof HasOneOrMany ? $relation->getForeignKeyName() : $relation->getOwnerKeyName();
+    }
+
     /**
      * @param Collection $relations
      * @param string     $operator

src/Relations/BelongsTo.php

@@ -9,6 +9,16 @@
 
 class BelongsTo extends \Illuminate\Database\Eloquent\Relations\BelongsTo
 {
+    /**
+     * Get the key for comparing against the parent key in "has" query.
+     *
+     * @return string
+     */
+    public function getHasCompareKey()
+    {
+        return $this->ownerKey;
+    }
+
     /** @inheritdoc */
     public function addConstraints()
     {

src/Relations/BelongsToMany.php

@@ -21,6 +21,16 @@
 
 class BelongsToMany extends EloquentBelongsToMany
 {
+    /**
+     * Get the key for comparing against the parent key in "has" query.
+     *
+     * @return string
+     */
+    public function getHasCompareKey()
+    {
+        return $this->getForeignKey();
+    }
+
     /** @inheritdoc */
     public function getRelationExistenceQuery(Builder $query, Builder $parentQuery, $columns = ['*'])
     {

src/Relations/HasMany.php

@@ -20,10 +20,20 @@ public function getForeignKeyName()
         return $this->foreignKey;
     }
 
+    /**
+     * Get the key for comparing against the parent key in "has" query.
+     *
+     * @return string
+     */
+    public function getHasCompareKey()
+    {
+        return $this->getForeignKeyName();
+    }
+
     /** @inheritdoc */
     public function getRelationExistenceQuery(Builder $query, Builder $parentQuery, $columns = ['*'])
     {
-        $foreignKey = $this->getForeignKeyName();
+        $foreignKey = $this->getHasCompareKey();
 
         return $query->select($foreignKey)->where($foreignKey, 'exists', true);
     }

src/Relations/HasOne.php

@@ -20,6 +20,16 @@ public function getForeignKeyName()
         return $this->foreignKey;
     }
 
+    /**
+     * Get the key for comparing against the parent key in "has" query.
+     *
+     * @return string
+     */
+    public function getHasCompareKey()
+    {
+        return $this->getForeignKeyName();
+    }
+
     /** @inheritdoc */
     public function getRelationExistenceQuery(Builder $query, Builder $parentQuery, $columns = ['*'])
     {