模型多态

src/Database/Mysql/MorphOne.php

+<?php
+/**
+ * Created by PhpStorm.
+ * User: admin
+ * Date: 2019/3/20
+ * Time: 17:37
+ */
+
+namespace One\Database\Mysql;
+
+class MorphOne
+{
+    protected $remote_type = [];
+
+    protected $remote_type_id = [];
+
+    /**
+     * @var Model
+     */
+    protected $model;
+
+    /**
+     * @var ListModel
+     */
+    protected $list_model;
+
+    protected $self_id = '';
+
+    protected $self_type = '';
+
+
+    public function __construct($remote_type, $remote_type_id, $self_type, $self_id, $model)
+    {
+        $this->self_id = $self_id;
+        foreach ($remote_type as $type => $remote_model) {
+            $this->remote_type[$type] = new $remote_model($this);
+        }
+        $this->remote_type_id = $remote_type_id;
+        $this->model          = $model;
+        $this->self_type      = $self_type;
+    }
+
+    /**
+     * @param array $calls [\Closure(Model)]
+     * @return $this
+     */
+    public function each(array $calls)
+    {
+        foreach ($calls as $type => $call) {
+            if (isset($this->remote_type[$type])) {
+                $call->call($this->remote_type[$type]);
+            }
+        }
+        return $this;
+    }
+
+    public function setRelation()
+    {
+        $type = $this->model[$this->self_type];
+        foreach ($this->remote_type as $type1 => $remote_model) {
+            if ($type1 == $type) {
+                $remote_model->where($this->remote_type_id[$type], $this->model[$this->self_id]);
+            } else {
+                unset($this->remote_type[$type1]);
+            }
+        }
+        return $this;
+    }
+
+    public function setRelationList(ListModel $list_model)
+    {
+        $this->list_model = $list_model;
+        $types            = $this->list_model->pluck($this->self_type, true, true);
+        foreach ($this->remote_type as $type => $remote_model) {
+            if (isset($types[$type])) {
+                $ids = array_column($types[$type], $this->self_id);
+                $remote_model->whereIn($this->remote_type_id[$type], $ids);
+            } else {
+                unset($this->remote_type[$type]);
+            }
+        }
+        return $this;
+    }
+
+
+    public function setRelationModel(Model $model)
+    {
+        $this->model = $model;
+        return $this->setRelation();
+    }
+
+
+    public function get()
+    {
+        return end($this->remote_type)->find();
+    }
+
+    public function merge($key)
+    {
+        if ($this->list_model === null) {
+            $this->model->$key = $this->get();
+        } else {
+            $third_arr = $this->third_model->findAll()->pluck($this->third_column, true);
+            foreach ($this->list_model as $val) {
+                $k         = $val[$this->self_column];
+                $val->$key = isset($third_arr[$k]) ? $third_arr[$k] : null;
+            }
+        }
+        unset($this->model, $this->third_model);
+    }
+
+
+}
\ No newline at end of file

src/Database/Mysql/RelationTrait.php

@@ -6,25 +6,48 @@ namespace One\Database\Mysql;
 trait RelationTrait
 {
     /**
-     * @param $self_column
-     * @param $third
-     * @param $third_column
+     * @param string $self_column
+     * @param string $remote
+     * @param string $remote_column
      * @return Model
      */
-    protected function hasOne($self_column, $third, $third_column)
+    protected function hasOne($self_column, $remote, $remote_column)
     {
-        return new HasOne($self_column, $third, $third_column, $this);
+        return new HasOne($self_column, $remote, $remote_column, $this);
     }
 
     /**
-     * @param $self_column
-     * @param $third
-     * @param $third_column
+     * @param string $self_column
+     * @param string $remote
+     * @param string $remote_column
      * @return Model
      */
-    protected function hasMany($self_column, $third, $third_column)
+    protected function hasMany($self_column, $remote, $remote_column)
     {
-        return new HasMany($self_column, $third, $third_column, $this);
+        return new HasMany($self_column, $remote, $remote_column, $this);
     }
 
+    /**
+     * @param array $remote_type [$self_type => $remote_model_class]
+     * @param array $remote_type_id [$self_type => $remote_table_rel_id]
+     * @param string $self_id
+     * @return MorphOne
+     */
+    protected function morphOne(array $remote_type, array $remote_type_id, $self_id)
+    {
+        return new MorphOne($remote_type, $remote_type_id, $self_id, $this);
+    }
+
+    /**
+     * @param array $remote_type [$self_type => $remote_model_class]
+     * @param array $remote_type_id [$self_type => $remote_table_rel_id]
+     * @param string $self_id
+     * @return Model
+     */
+    protected function morphMany(array $remote_type, array $remote_type_id, $self_id)
+    {
+        
+    }
+
+
 }
\ No newline at end of file