{"provider_url":"https://hatena.blog","url":"https://takahashikzn.root42.jp/entry/20100822/1282450334","version":"1.0","blog_title":"R42\u65e5\u8a18","image_url":null,"title":" \u7d9a\u30fb@ManyToMany\u3067ConcurrentModificationException\u304c\u51fa\u308b\u4ef6","author_url":"https://blog.hatena.ne.jp/takahashikzn/","categories":["EclipseLink"],"width":"100%","height":"190","blog_url":"https://takahashikzn.root42.jp/","author_name":"takahashikzn","description":"\u6614\u60a9\u3093\u3067\u3044\u305f\u3053\u306e\u30a8\u30e9\u30fc\u3002\u3084\u3063\u3068\u539f\u56e0\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u3002 \u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u3042\u3063\u305f\u3068\u3057\u307e\u3059\u3002 @Entity public class Shop { @ManyToMany // fetch\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306fLAZY\u3067\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f private Set<Product> products; ... } @Entity public class Product { ... } \u898b\u3066\u306e\u901a\u308a\u3001Shop\u3068Product\u306fN:N\u306e\u95a2\u9023\u3067\u3059\u3002 \u3053\u306e\u3068\u304d\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3068\u4e0a\u8a18\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3088\u3046\u3067\u3059\u3002 // \u65b0\u3057\u304f\u30bb\u30c3\u30c8\u3059\u308bShop.products\u306e\u5024\u3092\u4f5c\u6210 Set<P\u2026","published":"2010-08-22 13:12:14","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftakahashikzn.root42.jp%2Fentry%2F20100822%2F1282450334\" title=\" \u7d9a\u30fb@ManyToMany\u3067ConcurrentModificationException\u304c\u51fa\u308b\u4ef6 - R42\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","provider_name":"Hatena Blog"}