jQuery實現下拉框默認選中

<form class="form-inline" method="post" action="/score_result/">
        <input type="hidden" name="csrfmiddlewaretoken" value="UIbksfQRejaZFuAByesMRE9rtyGZgfJmUWRyONLqF121IqjkunGxnihnMAbvrOE3">
        <div class="form-group">
            <label for="exampleInputEmail2">選款批次：</label>
            
            <select name="selection_batch" id="selection_batch" class="form-control">
                
                    <option value="0814">0814</option>
                
                    <option value="0808">0808</option>
                
                    <option value="0810">0810</option>
                
                    <option value="0811">0811</option>
                
                    <option value="0807">0807</option>
                
            </select>
        </div>
        <div class="form-group">
            <label for="exampleInputName2">類目：</label>
            <select name="category" id="category" class="form-control">
                
                    <option value="小腳褲">小腳褲</option>
                
                    <option value="闊腿褲">闊腿褲</option>
                
                    <option value="半身裙">半身裙</option>
                
                    <option value="運動褲">運動褲</option>
                
                    <option value="哈倫褲">哈倫褲</option>
                
                    <option value="牛仔外套">牛仔外套</option>
                
                    <option value="工裝褲">工裝褲</option>
                
            </select>
        </div>
        <button type="submit" class="btn btn-default">查詢結果</button>
    </form>

    <script>
        // 批次號默認選中
        $('select#selection_batch').find('option').each(
            function () {
                if ($(this).val() == '{{ selection_batch_post }}') {
                    $(this).attr("selected", "selected");
                }
            }
        )
    </script>