独自の PHP フレームワークを構築する - Model クラスを実装する (3)

独自の PHP フレームワークを構築する - Model クラスを実装する (3)

前回のブログでは、Model クラスの findOne メソッドを実装および改良しました。その中に他のメソッドを実装してみましょう。

まず、findAll メソッドを見てみましょう。このメソッドは findOne とよく似ています。

<code class="sourceCode php">    <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> findOne<span class="ot">(</span><span class="kw">$condition</span> = <span class="kw">null</span><span class="ot">)</span>    {        <span class="kw">$sql</span> = <span class="st">&#39;select * from &#39;</span> . <span class="kw">static</span>::tableName<span class="ot">();</span>        <span class="kw">$params</span> = <span class="ot">[];</span>        <span class="co">// 判空</span>        <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$condition</span><span class="ot">))</span> {            <span class="kw">$sql</span> .= <span class="st">&#39; where &#39;</span><span class="ot">;</span>            <span class="kw">$params</span> = <span class="fu">array_values</span><span class="ot">(</span><span class="kw">$condition</span><span class="ot">);</span>            <span class="kw">$keys</span> = <span class="ot">[];</span>            <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$condition</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> {                <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">,</span> <span class="st">"</span><span class="kw">$key</span><span class="st"> = ?"</span><span class="ot">);</span>            }            <span class="kw">$sql</span> .= <span class="fu">implode</span><span class="ot">(</span><span class="st">&#39; and &#39;</span><span class="ot">,</span> <span class="kw">$keys</span><span class="ot">);</span>        }        <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span>        <span class="kw">$rs</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span>        <span class="kw">$models</span> = <span class="ot">[];</span>        <span class="kw">if</span> <span class="ot">(</span><span class="kw">$rs</span><span class="ot">)</span> {            <span class="co">// 直接获取出所有符合条件的</span>            <span class="kw">$rows</span> = <span class="kw">$stmt</span>->fetchAll<span class="ot">(</span><span class="kw">PDO</span>::<span class="kw">FETCH_ASSOC</span><span class="ot">);</span>            <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$rows</span> <span class="kw">as</span> <span class="kw">$row</span><span class="ot">)</span> {                <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$row</span><span class="ot">))</span> {                    <span class="kw">$model</span> = <span class="kw">new</span> <span class="kw">static</span><span class="ot">();</span>                    <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$row</span> <span class="kw">as</span> <span class="kw">$rowKey</span> => <span class="kw">$rowValue</span><span class="ot">)</span> {                        <span class="kw">$model</span>-><span class="kw">$rowKey</span> = <span class="kw">$rowValue</span><span class="ot">;</span>                    }                    <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$models</span><span class="ot">,</span> <span class="kw">$model</span><span class="ot">);</span>                }            }        }        <span class="kw">return</span> <span class="kw">null</span><span class="ot">;</span>    }</code>

findOne メソッドと findAll メソッドが非常に似ていることがわかります。共通部分を抽出できることは明らかであり、次の 2 つのメソッドがあります。 >

<code class="sourceCode php">    <span class="co">/**</span><span class="co">     * Build a sql where part</span><span class="co">     * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">mixed</span><span class="co"> $condition a set of column values</span><span class="co">     * </span><span class="kw">@return</span><span class="co"> string</span><span class="co">     */</span>    <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">,</span> <span class="kw">$params</span> = <span class="kw">null</span><span class="ot">)</span>    {        <span class="kw">if</span> <span class="ot">(</span><span class="fu">is_null</span><span class="ot">(</span><span class="kw">$params</span><span class="ot">))</span> {            <span class="kw">$params</span> = <span class="ot">[];</span>        }        <span class="kw">$where</span> = <span class="st">&#39;&#39;</span><span class="ot">;</span>        <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$condition</span><span class="ot">))</span> {            <span class="kw">$where</span> .= <span class="st">&#39; where &#39;</span><span class="ot">;</span>            <span class="kw">$keys</span> = <span class="ot">[];</span>            <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$condition</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> {                <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">,</span> <span class="st">"</span><span class="kw">$key</span><span class="st"> = ?"</span><span class="ot">);</span>                <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$params</span><span class="ot">,</span> <span class="kw">$value</span><span class="ot">);</span>            }            <span class="kw">$where</span> .= <span class="fu">implode</span><span class="ot">(</span><span class="st">&#39; and &#39;</span><span class="ot">,</span> <span class="kw">$keys</span><span class="ot">);</span>        }        <span class="kw">return</span> <span class="ot">[</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">];</span>    }    <span class="co">/**</span><span class="co">     * Convert array to model</span><span class="co">     * </span><span class="kw">@param</span><span class="co">  </span><span class="kw">mixed</span><span class="co"> $row the row data from database</span><span class="co">     */</span>    <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> arr2Model<span class="ot">(</span><span class="kw">$row</span><span class="ot">)</span>    {        <span class="kw">$model</span> = <span class="kw">new</span> <span class="kw">static</span><span class="ot">();</span>        <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$row</span> <span class="kw">as</span> <span class="kw">$rowKey</span> => <span class="kw">$rowValue</span><span class="ot">)</span> {            <span class="kw">$model</span>-><span class="kw">$rowKey</span> = <span class="kw">$rowValue</span><span class="ot">;</span>        }        <span class="kw">return</span> <span class="kw">$model</span><span class="ot">;</span>    }</code>

はそれぞれ SQL の where 部分を構築するメソッドと、見つかった配列をモデルに変換するメソッドです。なぜ最初のメソッドで params パラメータと戻り値が必要なのか疑問に思われるかもしれませんが、これは後で updateAll メソッドを使用するためです。実際、この場所は参照値渡しを使用するのに適しています。

このようにして、findOne と findAll は次のようになります:

<code class="sourceCode php">    <span class="co">/**</span><span class="co">     * Returns a single model instance by a primary key or an array of column values.</span><span class="co">     *</span><span class="co">     * ```php</span><span class="co">     * // find the first customer whose age is 30 and whose status is 1</span><span class="co">     * $customer = Customer::findOne([&#39;age&#39; => 30, &#39;status&#39; => 1]);</span><span class="co">     * ```</span><span class="co">     *</span><span class="co">     * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">mixed</span><span class="co"> $condition a set of column values</span><span class="co">     * </span><span class="kw">@return</span><span class="co"> static|null Model instance matching the condition, or null if nothing matches.</span><span class="co">     */</span>    <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> findOne<span class="ot">(</span><span class="kw">$condition</span> = <span class="kw">null</span><span class="ot">)</span>    {        <span class="fu">list</span><span class="ot">(</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">)</span> = <span class="kw">static</span>::buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">);</span>        <span class="kw">$sql</span> = <span class="st">&#39;select * from &#39;</span> . <span class="kw">static</span>::tableName<span class="ot">()</span> . <span class="kw">$where</span><span class="ot">;</span>        <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span>        <span class="kw">$rs</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span>        <span class="kw">if</span> <span class="ot">(</span><span class="kw">$rs</span><span class="ot">)</span> {            <span class="kw">$row</span> = <span class="kw">$stmt</span>->fetch<span class="ot">(</span><span class="kw">PDO</span>::<span class="kw">FETCH_ASSOC</span><span class="ot">);</span>            <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$row</span><span class="ot">))</span> {                <span class="kw">return</span> <span class="kw">static</span>::arr2Model<span class="ot">(</span><span class="kw">$row</span><span class="ot">);</span>            }        }        <span class="kw">return</span> <span class="kw">null</span><span class="ot">;</span>    }    <span class="co">/**</span><span class="co">     * Returns a list of models that match the specified primary key value(s) or a set of column values.</span><span class="co">     *</span><span class="co">     *  ```php</span><span class="co">     * // find customers whose age is 30 and whose status is 1</span><span class="co">     * $customers = Customer::findAll([&#39;age&#39; => 30, &#39;status&#39; => 1]);</span><span class="co">     * ```</span><span class="co">     *</span><span class="co">     * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">mixed</span><span class="co"> $condition a set of column values</span><span class="co">     * </span><span class="kw">@return</span><span class="co"> array an array of Model instance, or an empty array if nothing matches.</span><span class="co">     */</span>    <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> findAll<span class="ot">(</span><span class="kw">$condition</span> = <span class="kw">null</span><span class="ot">)</span>    {        <span class="fu">list</span><span class="ot">(</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">)</span> = <span class="kw">static</span>::buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">);</span>        <span class="kw">$sql</span> = <span class="st">&#39;select * from &#39;</span> . <span class="kw">static</span>::tableName<span class="ot">()</span> . <span class="kw">$where</span><span class="ot">;</span>        <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span>        <span class="kw">$rs</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span>        <span class="kw">$models</span> = <span class="ot">[];</span>        <span class="kw">if</span> <span class="ot">(</span><span class="kw">$rs</span><span class="ot">)</span> {            <span class="kw">$rows</span> = <span class="kw">$stmt</span>->fetchAll<span class="ot">(</span><span class="kw">PDO</span>::<span class="kw">FETCH_ASSOC</span><span class="ot">);</span>            <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$rows</span> <span class="kw">as</span> <span class="kw">$row</span><span class="ot">)</span> {                <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$row</span><span class="ot">))</span> {                    <span class="kw">$model</span> = <span class="kw">static</span>::arr2Model<span class="ot">(</span><span class="kw">$row</span><span class="ot">);</span>                    <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$models</span><span class="ot">,</span> <span class="kw">$model</span><span class="ot">);</span>                }            }        }        <span class="kw">return</span> <span class="kw">$models</span><span class="ot">;</span>    }</code>

残りの updateAll/deleteAll/insert/update メソッドと delete メソッドは異なります。詳細については、コードが直接与えられます。基本的な考え方は同じで、すべてルールに従って SQL ステートメントを結合します。

<code class="sourceCode php">    <span class="co">/**</span><span class="co">     * Updates models using the provided attribute values and conditions.</span><span class="co">     * For example, to change the status to be 2 for all customers whose status is 1:</span><span class="co">     *</span><span class="co">     * ~~~</span><span class="co">     * Customer::updateAll([&#39;status&#39; => 1], [&#39;status&#39; => &#39;2&#39;]);</span><span class="co">     * ~~~</span><span class="co">     *</span><span class="co">     * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">array</span><span class="co"> $attributes attribute values (name-value pairs) to be saved for the model.</span><span class="co">     * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">array</span><span class="co"> $condition the condition that matches the models that should get updated.</span><span class="co">     * An empty condition will match all models.</span><span class="co">     * </span><span class="kw">@return</span><span class="co"> integer the number of rows updated</span><span class="co">     */</span>    <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> updateAll<span class="ot">(</span><span class="kw">$condition</span><span class="ot">,</span> <span class="kw">$attributes</span><span class="ot">)</span>    {        <span class="kw">$sql</span> = <span class="st">&#39;update &#39;</span> . <span class="kw">static</span>::tableName<span class="ot">();</span>        <span class="kw">$params</span> = <span class="ot">[];</span>        <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">empty</span><span class="ot">(</span><span class="kw">$attributes</span><span class="ot">))</span> {            <span class="kw">$sql</span> .= <span class="st">&#39; set &#39;</span><span class="ot">;</span>            <span class="kw">$params</span> = <span class="fu">array_values</span><span class="ot">(</span><span class="kw">$attributes</span><span class="ot">);</span>            <span class="kw">$keys</span> = <span class="ot">[];</span>            <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$attributes</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> {                <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">,</span> <span class="st">"</span><span class="kw">$key</span><span class="st"> = ?"</span><span class="ot">);</span>            }            <span class="kw">$sql</span> .= <span class="fu">implode</span><span class="ot">(</span><span class="st">&#39; , &#39;</span><span class="ot">,</span> <span class="kw">$keys</span><span class="ot">);</span>        }        <span class="fu">list</span><span class="ot">(</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">)</span> = <span class="kw">static</span>::buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">);</span>        <span class="kw">$sql</span> .= <span class="kw">$where</span><span class="ot">;</span>        <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span>        <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span>        <span class="kw">if</span> <span class="ot">(</span><span class="kw">$execResult</span><span class="ot">)</span> {            <span class="co">// 获取更新的行数</span>            <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->rowCount<span class="ot">();</span>        }        <span class="kw">return</span> <span class="kw">$execResult</span><span class="ot">;</span>    }    <span class="co">/**</span><span class="co">     * Deletes models using the provided conditions.</span><span class="co">     * WARNING: If you do not specify any condition, this method will delete ALL rows in the table.</span><span class="co">     *</span><span class="co">     * For example, to delete all customers whose status is 3:</span><span class="co">     *</span><span class="co">     * ~~~</span><span class="co">     * Customer::deleteAll([status = 3]);</span><span class="co">     * ~~~</span><span class="co">     *</span><span class="co">     * </span><span class="kw">@param</span><span class="co"> </span><span class="kw">array</span><span class="co"> $condition the condition that matches the models that should get deleted.</span><span class="co">     * An empty condition will match all models.</span><span class="co">     * </span><span class="kw">@return</span><span class="co"> integer the number of rows deleted</span><span class="co">     */</span>    <span class="kw">public</span> <span class="kw">static</span> <span class="kw">function</span> deleteAll<span class="ot">(</span><span class="kw">$condition</span><span class="ot">)</span>    {        <span class="fu">list</span><span class="ot">(</span><span class="kw">$where</span><span class="ot">,</span> <span class="kw">$params</span><span class="ot">)</span> = <span class="kw">static</span>::buildWhere<span class="ot">(</span><span class="kw">$condition</span><span class="ot">);</span>        <span class="kw">$sql</span> = <span class="st">&#39;delete from &#39;</span> . <span class="kw">static</span>::tableName<span class="ot">()</span> . <span class="kw">$where</span><span class="ot">;</span>        <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span>        <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span>        <span class="kw">if</span> <span class="ot">(</span><span class="kw">$execResult</span><span class="ot">)</span> {            <span class="co">// 获取删除的行数</span>            <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->rowCount<span class="ot">();</span>        }        <span class="kw">return</span> <span class="kw">$execResult</span><span class="ot">;</span>    }    <span class="co">/**</span><span class="co">     * Inserts the model into the database using the attribute values of this record.</span><span class="co">     *</span><span class="co">     * Usage example:</span><span class="co">     *</span><span class="co">     * ```php</span><span class="co">     * $customer = new Customer;</span><span class="co">     * $customer->name = $name;</span><span class="co">     * $customer->email = $email;</span><span class="co">     * $customer->insert();</span><span class="co">     * ```</span><span class="co">     *</span><span class="co">     * </span><span class="kw">@return</span><span class="co"> boolean whether the model is inserted successfully.</span><span class="co">     */</span>    <span class="kw">public</span> <span class="kw">function</span> insert<span class="ot">()</span>    {        <span class="kw">$sql</span> = <span class="st">&#39;insert into &#39;</span> . <span class="kw">static</span>::tableName<span class="ot">();</span>        <span class="kw">$params</span> = <span class="ot">[];</span>        <span class="kw">$keys</span> = <span class="ot">[];</span>        <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$this</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> {            <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">,</span> <span class="kw">$key</span><span class="ot">);</span>            <span class="fu">array_push</span><span class="ot">(</span><span class="kw">$params</span><span class="ot">,</span> <span class="kw">$value</span><span class="ot">);</span>        }        <span class="co">// 构建由？组成的数组，其个数与参数相等数相同</span>        <span class="kw">$holders</span> = <span class="fu">array_fill</span><span class="ot">(</span><span class="dv">0</span><span class="ot">,</span> <span class="fu">count</span><span class="ot">(</span><span class="kw">$keys</span><span class="ot">),</span> <span class="st">&#39;?&#39;</span><span class="ot">);</span>        <span class="kw">$sql</span> .= <span class="st">&#39; (&#39;</span> . <span class="fu">implode</span><span class="ot">(</span><span class="st">&#39; , &#39;</span><span class="ot">,</span> <span class="kw">$keys</span><span class="ot">)</span> . <span class="st">&#39;) values ( &#39;</span> . <span class="fu">implode</span><span class="ot">(</span><span class="st">&#39; , &#39;</span><span class="ot">,</span> <span class="kw">$holders</span><span class="ot">)</span> . <span class="st">&#39;)&#39;</span><span class="ot">;</span>        <span class="kw">$stmt</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->prepare<span class="ot">(</span><span class="kw">$sql</span><span class="ot">);</span>        <span class="kw">$execResult</span> = <span class="kw">$stmt</span>->execute<span class="ot">(</span><span class="kw">$params</span><span class="ot">);</span>        <span class="co">// 将一些自增值赋回Model中</span>        <span class="kw">$primaryKeys</span> = <span class="kw">static</span>::primaryKey<span class="ot">();</span>        <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$primaryKeys</span> <span class="kw">as</span> <span class="kw">$name</span><span class="ot">)</span> {            <span class="co">// Get the primary key</span>            <span class="kw">$lastId</span> = <span class="kw">static</span>::getDb<span class="ot">()</span>->lastInsertId<span class="ot">(</span><span class="kw">$name</span><span class="ot">);</span>            <span class="kw">$this</span>-><span class="kw">$name</span> = <span class="dt">(int)</span> <span class="kw">$lastId</span><span class="ot">;</span>        }        <span class="kw">return</span> <span class="kw">$execResult</span><span class="ot">;</span>    }    <span class="co">/**</span><span class="co">     * Saves the changes to this model into the database.</span><span class="co">     *</span><span class="co">     * Usage example:</span><span class="co">     *</span><span class="co">     * ```php</span><span class="co">     * $customer = Customer::findOne([&#39;id&#39; => $id]);</span><span class="co">     * $customer->name = $name;</span><span class="co">     * $customer->email = $email;</span><span class="co">     * $customer->update();</span><span class="co">     * ```</span><span class="co">     *</span><span class="co">     * </span><span class="kw">@return</span><span class="co"> integer|boolean the number of rows affected.</span><span class="co">     * Note that it is possible that the number of rows affected is 0, even though the</span><span class="co">     * update execution is successful.</span><span class="co">     */</span>    <span class="kw">public</span> <span class="kw">function</span> update<span class="ot">()</span>    {        <span class="kw">$primaryKeys</span> = <span class="kw">static</span>::primaryKey<span class="ot">();</span>        <span class="kw">$condition</span> = <span class="ot">[];</span>        <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$primaryKeys</span> <span class="kw">as</span> <span class="kw">$name</span><span class="ot">)</span> {            <span class="kw">$condition</span><span class="ot">[</span><span class="kw">$name</span><span class="ot">]</span> = <span class="fu">isset</span><span class="ot">(</span><span class="kw">$this</span>-><span class="kw">$name</span><span class="ot">)</span> <span class="ot">?</span> <span class="kw">$this</span>-><span class="kw">$name</span> <span class="ot">:</span> <span class="kw">null</span><span class="ot">;</span>        }        <span class="kw">$attributes</span> = <span class="ot">[];</span>        <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$this</span> <span class="kw">as</span> <span class="kw">$key</span> => <span class="kw">$value</span><span class="ot">)</span> {            <span class="kw">if</span> <span class="ot">(</span>!<span class="fu">in_array</span><span class="ot">(</span><span class="kw">$key</span><span class="ot">,</span> <span class="kw">$primaryKeys</span><span class="ot">,</span> <span class="kw">true</span><span class="ot">))</span> {                <span class="kw">$attributes</span><span class="ot">[</span><span class="kw">$key</span><span class="ot">]</span> = <span class="kw">$value</span><span class="ot">;</span>            }        }        <span class="kw">return</span> <span class="kw">static</span>::updateAll<span class="ot">(</span><span class="kw">$condition</span><span class="ot">,</span> <span class="kw">$attributes</span><span class="ot">)</span> !== <span class="kw">false</span><span class="ot">;</span>    }    <span class="co">/**</span><span class="co">     * Deletes the model from the database.</span><span class="co">     *</span><span class="co">     * </span><span class="kw">@return</span><span class="co"> integer|boolean the number of rows deleted.</span><span class="co">     * Note that it is possible that the number of rows deleted is 0, even though the deletion execution is successful.</span><span class="co">     */</span>    <span class="kw">public</span> <span class="kw">function</span> delete<span class="ot">()</span>    {        <span class="kw">$primaryKeys</span> = <span class="kw">static</span>::primaryKey<span class="ot">();</span>        <span class="kw">$condition</span> = <span class="ot">[];</span>        <span class="kw">foreach</span> <span class="ot">(</span><span class="kw">$primaryKeys</span> <span class="kw">as</span> <span class="kw">$name</span><span class="ot">)</span> {            <span class="kw">$condition</span><span class="ot">[</span><span class="kw">$name</span><span class="ot">]</span> = <span class="fu">isset</span><span class="ot">(</span><span class="kw">$this</span>-><span class="kw">$name</span><span class="ot">)</span> <span class="ot">?</span> <span class="kw">$this</span>-><span class="kw">$name</span> <span class="ot">:</span> <span class="kw">null</span><span class="ot">;</span>        }        <span class="kw">return</span> <span class="kw">static</span>::deleteAll<span class="ot">(</span><span class="kw">$condition</span><span class="ot">)</span> !== <span class="kw">false</span><span class="ot">;</span>    }</code>

この基本的なモデルはまだ多くの問題や制限があるかもしれませんが、現時点ではこれだけです。機会があれば段階的に改善していきます。 。

さて、今日はここまでにしましょう。プロジェクトの内容やブログの内容も Github に載せる予定ですので、皆様からのご提案をお待ちしております。

コード: https://github.com/CraryPrimitiveMan/simple-framework/tree/0.7

ブログプロジェクト: https://github.com/CraryPrimitiveMan/create-your-own- php-framework