質問編集履歴
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ソースコード
test
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test
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@@ -18,4 +18,100 @@
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### 該当のソースコード
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```haml
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//new.html.haml
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= form_for @product do |f|
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商品名#{f.text_field :name}
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%br/
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価格#{f.number_field :price}
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%br/
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#image-box
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= f.fields_for :images do |image|
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.js-file_group{"data-index" => "#{image.index}"}
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= image.file_field :src, class: 'js-file'
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%br/
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%span.js-remove 削除
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= f.submit
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```
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```javascript
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$(document).on('turbolinksload', ()=> {
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// 画像用のinputを生成する関数
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const buildFileField = (index)=> {
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const html = `<div class="js-file_group" data-index="${index}">
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<input class="js-file" type="file"
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name="product[images_attributes][${index}][src]"
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id="product_images_attributes_${index}_src">
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<br>
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<span class="js-remove">削除</div>
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</div>`;
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return html;
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}
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// file_fieldのnameに動的なindexをつける為の配列
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let fileIndex = [1,2,3,4,5,6,7,8,9,10];
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$('#image-box').on('change', '.js-file', function(e) {
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// fileIndexの先頭の数字を使ってinputを作る
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$('#image-box').append(buildFileField(fileIndex[0]));
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fileIndex.shift();
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// 末尾の数に1足した数を追加する
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fileIndex.push(fileIndex[fileIndex.length - 1] + 1)
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});
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$('#image-box').on('click', '.js-remove', function() {
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$(this).parent().remove();
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// 画像入力欄が0個にならないようにしておく
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if ($('.js-file').length == 0) $('#image-box').append(buildFileField(fileIndex[0]));
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112
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});
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});
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```
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