{"id":3184,"date":"2022-07-28T11:56:01","date_gmt":"2022-07-28T02:56:01","guid":{"rendered":"https:\/\/weseek.co.jp\/tech\/?p=3184"},"modified":"2023-04-17T10:53:55","modified_gmt":"2023-04-17T01:53:55","slug":"%e3%80%90mongodb%e3%80%91%e6%9c%a8%e6%a7%8b%e9%80%a0%e3%83%a2%e3%83%87%e3%83%ab%e3%81%ae%e4%bd%9c%e6%88%90%e3%81%a8%e3%83%89%e3%82%ad%e3%83%a5%e3%83%a1%e3%83%b3%e3%83%88%e5%8f%96%e5%be%97","status":"publish","type":"post","link":"https:\/\/weseek.co.jp\/tech\/3184\/","title":{"rendered":"\u3010MongoDB\u3011\u6728\u69cb\u9020\u30e2\u30c7\u30eb\u306e\u4f5c\u6210\u3068\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u53d6\u5f97"},"content":{"rendered":"<p>\u7686\u3055\u3093\u3053\u3093\u306b\u3061\u306f\uff01WESEEK \u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a8\u30f3\u30b8\u30cb\u30a2\u306e <a href=\"https:\/\/twitter.com\/TaichiMasuyama\">\u5897\u5c71<\/a> \u3067\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u3001MongoDB (mongoose) \u3067\u6728\u69cb\u9020\u306e\u30e2\u30c7\u30eb\u306e\u4f5c\u6210\u3068\u3001\u305d\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u53d6\u5f97\u6226\u7565\u306b\u3064\u3044\u3066\u8003\u3048\u307e\u3059\u3002<\/p>\n<p>JavaScript \u306e <a href=\"https:\/\/javascript.info\/async-iterators-generators\">AsyncGenerator<\/a> \u3092\u4f7f\u3063\u305f\u65b9\u6cd5\u3068\u3001MongoDB \u306e <a href=\"https:\/\/www.mongodb.com\/docs\/manual\/reference\/operator\/aggregation\/graphLookup\/\">$graphLookup (aggregation)<\/a> \u3092\u4f7f\u3063\u305f\u65b9\u6cd5\u306e2\u3064\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<p><!--more--><\/p>\n<h1>\u76ee\u6b21<\/h1>\n\n<h1>\u524d\u63d0\u77e5\u8b58<\/h1>\n<p>\u4ee5\u4e0b\u306e\u524d\u63d0\u77e5\u8b58\u304c\u3042\u308b\u3068\u3088\u308a\u697d\u306b\u8aad\u307f\u9032\u3081\u3089\u308c\u308b\u3068\u601d\u3044\u307e\u3059\u306e\u3067\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li>JavaScript \u306e AsyncIterator, AsyncGenerator\n<ul>\n<li><a href=\"https:\/\/javascript.info\/async-iterators-generators\">https:\/\/javascript.info\/async-iterators-generators<\/a><\/li>\n<\/ul>\n<\/li>\n<li>MongoDB\n<ul>\n<li><a href=\"https:\/\/www.mongodb.com\/\">https:\/\/www.mongodb.com\/<\/a><\/li>\n<\/ul>\n<\/li>\n<li>mongoose\n<ul>\n<li><a href=\"https:\/\/mongoosejs.com\/\">https:\/\/mongoosejs.com\/<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1>\u4eca\u56de\u6271\u3046\u6728\u69cb\u9020\u306e\u30e2\u30c7\u30eb<\/h1>\n<p>\u4eca\u56de\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u6728\u69cb\u9020\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u6271\u3044\u307e\u3059\u3002<\/p>\n<p>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u304c\u4ed6\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e <code>ObjectId<\/code> \u3092\u89aa\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u53c2\u7167\u3068\u3057\u3066\u6301\u3064\u69cb\u9020\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-typescript:NodeSchema.ts\">const nodeSchema = new Schema({\n  parent: { type: mongoose.Schema.Types.ObjectId, ref: &#039;Node&#039; },\n  name: { type: String, default: &#039;&#039; },\n});<\/code><\/pre>\n<p>MongoDB \u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u306f\u4ed6\u306b\u3082\u3044\u304f\u3064\u304b\u306e\u6728\u69cb\u9020\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u4f8b\u304c\u6319\u3052\u3089\u308c\u3066\u3044\u307e\u3059\u306e\u3067\u8208\u5473\u304c\u3042\u308c\u3070 <a href=\"https:\/\/www.mongodb.com\/docs\/manual\/applications\/data-models-tree-structures\/\">\u3053\u3061\u3089<\/a> \u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<h1>\u30b4\u30fc\u30eb<\/h1>\n<p>\u3042\u308b <code>Node<\/code> \u3092\u6307\u5b9a\u3057\u305f\u6642\u306b\u305d\u306e\u5b50\u5b6b\u306e <code>Node<\/code> \u3092\u5168\u3066\u53d6\u5f97\u3059\u308b\u3068\u3044\u3046\u30b7\u30c1\u30e5\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u8003\u3048\u3066\u898b\u307e\u3059\u3002<\/p>\n<h1>\u65b9\u6cd51<\/h1>\n<p>\u65b9\u6cd51\u3067\u306f\u3001\u9806\u5e8f\u95a2\u4fc2\u306a\u3057\u306b\u3001\u7279\u5b9a\u306e <code>Node<\/code> \u306e\u5168\u3066\u306e\u5b50\u5b6b <code>Node<\/code> \u3092 <code>Iterable<\/code> \u3068\u3057\u3066\u53d6\u5f97\u3059\u308b\u3053\u3068\u300d\u3092\u76ee\u6307\u3057\u307e\u3059\u3002<\/p>\n<h2>\u5b9f\u88c5<\/h2>\n<p>\u30b3\u30fc\u30c9\u4e0a\u306e\u30b3\u30e1\u30f3\u30c8\u3067\u5b9f\u88c5\u306e\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u6700\u7d42\u7684\u306b <code>generateIterable<\/code> \u3092\u547c\u3076\u3053\u3068\u3067\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-typescript:IterableTreeDocsFactory.ts\">\/\/ \u7a7a\u914d\u5217\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u304b\u3081\u308b\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\nconst isEmptyArray = (val: any): val is never[] =&gt; {\n    return &#039;length&#039; in val &amp;&amp; val.length === 0\n}\n\nclass IterableTreeDocsFactory {\n\n  async generateIterable(initialNode: NodeDocument): Promise&lt;AsyncGenerator&lt;NodeDocument&gt; | never[]&gt; {\n    \/\/ \u30eb\u30fc\u30c8\u3068\u306a\u308b initialNode \u304b\u3089 Cursor \u3092\u4f5c\u6210\n    const initialCursor = await this.getCursor(initialNode)\n\n    return this.generateDescendantNodes(initialCursor)\n  }\n\n  private async* generateDescendantNodes(cursor: Cursor&lt;NodeDocument&gt;): AsyncGenerator&lt;NodeDocument&gt; {\n    \/\/ 1. cursor \u306b\u542b\u307e\u308c\u308b node \u3092\u30a4\u30c6\u30ec\u30fc\u30c8\u3057\u3066\u3055\u3089\u306b cursor \u3092\u751f\u6210\n    \/\/ 2. \u65b0\u305f\u306a cursor \u3067\u518d\u5e30\u7684\u306b generateDescendantNodes \u3092\u547c\u3073\u51fa\u3059\n    \/\/ 3. node \u81ea\u4f53\u306f yield \u3059\u308b\n    for await (const node of cursor) {\n      const nextCursor = await this.getCursor(node)\n\n      if (!isEmptyArray(nextCursor)) {\n        yield* this.generateDescendantNodes(nextCursor) \/\/ \u518d\u5e30\u7684\u306b yield \u3059\u308b\n      }\n\n      yield node\n    }\n  }\n\n  private async getCursor(node: NodeDocument): Promise&lt;Cursor&lt;NodeDocument&gt;&gt; {\n    const Node = mongoose.model(&#039;Node&#039;)\n\n    const cursor = Node\n        .find({ parent: node })\n        .lean()\n        .cursor({ batchSize: 10 })\n\n    return cursor\n  }\n}<\/code><\/pre>\n<p>5.0.x \u7cfb\u307e\u3067\u306e <a href=\"https:\/\/growi.org\/ja\/\">GROWI<\/a> \u3067\u3082\u4f3c\u305f\u3088\u3046\u306a\u5b9f\u88c5\u304c\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<p>\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306f <a href=\"https:\/\/github.com\/weseek\/growi\/blame\/14c2e33dfdf442ea696310d80865f72f2a4cc546\/packages\/app\/src\/server\/service\/page.ts#L42\">\u3053\u3061\u3089<\/a><\/p>\n<h2>\u4f7f\u3044\u65b9<\/h2>\n<p>\u4f7f\u3044\u65b9\u306e\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<br \/>\n\u3053\u3053\u3067\u306f\u3088\u308a\u5b9f\u8df5\u5411\u3051\u306b\u306a\u308b\u3088\u3046\u306b\u3001 <code>Writable<\/code> stream \u306b pipe \u3057\u3066\u305d\u306e\u4e2d\u3067 node \u3092\u4f7f\u3063\u305f\u51e6\u7406\u3092\u3059\u308b\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u30eb\u30fc\u30c8\u3068\u306a\u308b <code>NodeDocument<\/code> \u3092\u53d6\u5f97<br \/>\n<code>Node.findOne()<\/code> \u306b\u6761\u4ef6\u3092\u6e21\u3059\u3053\u3068\u3067\u3001\u7279\u5b9a\u306e <code>NodeDocument<\/code> \u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre><code class=\"language-typescript:usage.ts\">const Node = mongoose.model(&#039;Node&#039;);\n\nconst initialNode = await Node.findOne();<\/code><\/pre>\n<ol start=\"2\">\n<li><code>IterableTreeDocsFactory<\/code> \u3092\u521d\u671f\u5316\u3057\u3066 <code>generateIterable<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3076<br \/>\n\u3053\u308c\u306b\u3088\u3063\u3066 AsyncGenerator <code>iterableTree<\/code> \u304c\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre><code class=\"language-typescript:usage.ts\">const factory = new IterableTreeDocsFactory();\nconst iterableTree = await factory.generateIterable(initialNode);<\/code><\/pre>\n<ol start=\"3\">\n<li>Readable \u306b\u5909\u63db<br \/>\n4 \u306e <code>Writable<\/code> \u306b pipe \u3059\u308b\u305f\u3081\u306b <code>Readable<\/code> \u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre><code class=\"language-typescript:usage.ts\">const readableStream = Readable.from(iterableTree);<\/code><\/pre>\n<ol start=\"4\">\n<li>Writable \u3067 node \u3092\u53d7\u3051\u53d6\u3063\u3066\u76ee\u7684\u306e\u64cd\u4f5c\u3092\u3059\u308b<\/li>\n<\/ol>\n<pre><code class=\"language-typescript:usage.ts\">const writeStream = new Writable({\n  objectMode: true,\n  async write(node, encoding, callback) {\n    \/\/ node \u3092\u4f7f\u3063\u305f\u51e6\u7406\n\n    callback();\n  },\n  async final(callback) {\n    callback();\n  },\n});<\/code><\/pre>\n<ol start=\"5\">\n<li>Stream \u3092 pipe \u3059\u308b<br \/>\n\u6700\u5f8c\u306b <code>readableStream<\/code> \u3068 <code>writeStream<\/code> \u3092 pipe \u3067\u7e4b\u3052\u308b\u3053\u3068\u3067\u30c7\u30fc\u30bf\u304c\u6d41\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre><code class=\"language-typescript:usage.ts\">readStream.pipe(writeStream);<\/code><\/pre>\n<h2>\u59a5\u5354\u70b9<\/h2>\n<p>\u4eca\u56de\u5b9f\u88c5\u3057\u305f AsyncGenerator \u3092\u4f7f\u3063\u305f\u6728\u69cb\u9020\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u53d6\u5f97\u51e6\u7406\u306f\u5927\u304d\u304f2\u3064\u306e\u8ab2\u984c\u304c\u6b8b\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4>\u9806\u756a\u3092\u5236\u5fa1\u3067\u304d\u306a\u3044<\/h4>\n<p>\u65b9\u6cd51\u3067\u306f\u3001\u53d6\u5f97\u3059\u308b\u9806\u756a\u3092 Node \u306e\u540d\u524d\u9806\u306b\u3057\u305f\u308a Node \u306e\u4f5c\u6210\u3055\u308c\u305f\u9806\u306b\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u306a\u306e\u3067\u3001\u3082\u3057\u30bd\u30fc\u30c8\u3057\u305f\u3044\u5834\u5408\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u3067\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h4>\u30af\u30a8\u30ea\u6570 = \u53d6\u5f97\u3059\u308b\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u6570\u306b\u306a\u3063\u3066\u3057\u307e\u3046<\/h4>\n<p>\u65b9\u6cd51\u3067\u306f\u3001<code>generateDescendantNodes<\/code> \u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u518d\u5e30\u7684\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u3063\u3066\u3044\u307e\u3059\u30021 Node \u53d6\u5f97\u3059\u308b\u305f\u3081\u306b 1\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u767a\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u3067\u3001MongoDB \u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u308b\u3053\u3068\u306b\u3088\u308b\u30ea\u30bd\u30fc\u30b9\u7684\u30fb\u6642\u9593\u7684\u306a\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u767a\u751f\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u5c11\u6570\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u53d6\u5f97\u3057\u3066\u304f\u308b\u5834\u5408\u306f\u554f\u984c\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u304c\u3001\u3053\u308c\u304c\u5927\u304d\u304f\u306a\u3063\u3066\u304f\u308b\u3068\u53d6\u308a\u56de\u3057\u3065\u3089\u304f\u306a\u3063\u3066\u3057\u307e\u3046\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u305d\u3053\u3067\u6b21\u306e\u65b9\u6cd52\u3067\u306f\u3053\u308c\u3089\u306e\u59a5\u5354\u70b9\u3092\u514b\u670d\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h1>\u65b9\u6cd52<\/h1>\n<p>\u65b9\u6cd52\u3067\u306f\u3001<a href=\"https:\/\/www.mongodb.com\/docs\/manual\/reference\/operator\/aggregation\/graphLookup\/\">$graphLookup (aggregation)<\/a> \u3092\u4f7f\u3063\u3066\u65b9\u6cd51\u306e\u59a5\u5354\u70b9\u3092\u6539\u5584\u3057\u307e\u3059\u3002<\/p>\n<h2>\u5b9f\u88c5\u3068\u89e3\u8aac<\/h2>\n<p>Aggregation \u3067\u306f\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u30c7\u30fc\u30bf\u3092\u5909\u5f62\u3057\u3066\u304b\u3089\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<br \/>\n\u305d\u308c\u305e\u308c\u306e\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u8a73\u3057\u3044\u8aac\u660e\u306f <a href=\"https:\/\/www.mongodb.com\/docs\/manual\/core\/aggregation-pipeline\/\">MongoDB Aggregation pipeline<\/a> \u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<ol>\n<li>$match\n<ul>\n<li><code>$parentID<\/code> \u3092 <code>_id<\/code> \u306b\u3082\u3064\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u6b21\u306e\u30b9\u30c6\u30fc\u30b8\u306b\u6d41\u3059<\/li>\n<li>\u3053\u3053\u3067\u30de\u30c3\u30c1\u3057\u305f\u5168\u3066\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u5bfe\u3057\u3066 <code>$graphLookup<\/code> \u304c\u8d70\u308b<\/li>\n<\/ul>\n<\/li>\n<li>$graphLookup\n<ul>\n<li><code>_id<\/code> \u3092\u8d77\u70b9\u306b\u3001<code>_id = parent<\/code> \u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u63a2\u3059<\/li>\n<li>\u3053\u306e\u3068\u304d\u6df1\u3055\u306f <code>\u221e<\/code> \u307e\u3067<\/li>\n<li>\u305d\u306e\u7d50\u679c\u3092 <code>descendants<\/code> \u3068\u3057\u3066\u6b21\u306e\u30b9\u30c6\u30fc\u30b8\u306b\u6d41\u3059<\/li>\n<\/ul>\n<\/li>\n<li>$unwind\n<ul>\n<li><code>descendants<\/code> \u3092\u5c55\u958b<\/li>\n<\/ul>\n<\/li>\n<li>$replaceRoot\n<ul>\n<li>\u5404\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e <code>descendants<\/code> \u306e\u914d\u5217\u306b\u5909\u63db<\/li>\n<\/ul>\n<\/li>\n<li>$project\n<ul>\n<li>\u5fc5\u8981\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u307f\u306b\u30d7\u30ed\u30b8\u30a7\u30af\u30b7\u30e7\u30f3<\/li>\n<li><code>nameLength<\/code> \u30d5\u30a3\u30fc\u30eb\u30c9\u306b <code>name<\/code> \u306e\u9577\u3055\u3092\u683c\u7d0d<\/li>\n<li><code>$addFields<\/code> \u3067\u3082\u540c\u69d8\u306e\u64cd\u4f5c\u304c\u53ef\u80fd<\/li>\n<\/ul>\n<\/li>\n<li>$sort\n<ul>\n<li><code>nameLength (\u964d\u9806)<\/code> \u306e\u3042\u3068\u306b <code>name (\u6607\u9806)<\/code> \u3067\u30bd\u30fc\u30c8<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u7d50\u679c\u3068\u3057\u3066 1. \u306e\u30da\u30fc\u30b8\u306e\u5b50\u5b6b\u5168\u3066\u304c <code>name<\/code> \u306e\u964d\u9806\u306b\u306a\u3063\u3066\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-typescript:graphLookup.ts\">const Node = mongoose.model(&#039;Node&#039;);\nconst descendantNodes = await Node.aggregate([\n        {\n          $match: {\n            _id: $parentID, \/\/ $parentID \u306f\u30eb\u30fc\u30c8\u3068\u306a\u308b\u30da\u30fc\u30b8\u306e ObjectID\n          },\n        },\n        {\n          $graphLookup: {\n            from: &#039;nodes&#039;,\n            startWith: &#039;$_id&#039;,\n            connectFromField: &#039;_id&#039;,\n            connectToField: &#039;parent&#039;,\n            as: &#039;descendants&#039;,\n          },\n        },\n        {\n          $unwind: &#039;$descendants&#039;,\n        },\n        {\n          $replaceRoot: {\n            newRoot: &#039;$descendants&#039;,\n          },\n        },\n        {\n          $project: {\n            _id: 1,\n            parent: 1,\n            name: 1,\n            nameLength: { $strLenCP: &#039;$name&#039; },\n          },\n        },\n        {\n          $sort: {\n            nameLength: -1,\n            name: 1,\n          },\n        },\n      ]);<\/code><\/pre>\n<p>\u7d50\u679c<\/p>\n<pre><code class=\"language-js\">[\n   {\n      &quot;_id&quot;:&quot;62dba2d15322d2c95410eead&quot;,\n      &quot;parent&quot;:&quot;62dba2d15322d2c95410eeab&quot;,\n      &quot;name&quot;:&quot;\/$parent\/child1\/grandChild1&quot;,\n      &quot;nameLength&quot;:27\n   },\n   {\n      &quot;_id&quot;:&quot;62dba2d15322d2c95410eeae&quot;,\n      &quot;parent&quot;:&quot;62dba2d15322d2c95410eeab&quot;,\n      &quot;name&quot;:&quot;\/$parent\/child1\/grandChild2&quot;,\n      &quot;nameLength&quot;:27\n   },\n   {\n      &quot;_id&quot;:&quot;62dba2d15322d2c95410eeab&quot;,\n      &quot;parent&quot;:&quot;62dba2d15322d2c95410eeaa&quot;,\n      &quot;name&quot;:&quot;\/$parent\/child1&quot;,\n      &quot;nameLength&quot;:15\n   },\n   {\n      &quot;_id&quot;:&quot;62dba2d15322d2c95410eeac&quot;,\n      &quot;parent&quot;:&quot;62dba2d15322d2c95410eeaa&quot;,\n      &quot;name&quot;:&quot;\/$parent\/child2&quot;,\n      &quot;nameLength&quot;:15\n   }\n]<\/code><\/pre>\n<p>\u3053\u308c\u30671\u30af\u30a8\u30ea\u306e\u307f\u3067\u76ee\u7684\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u53d6\u5f97\u3067\u304d\u307e\u3057\u305f\u3002<br \/>\n\u3053\u306e\u65b9\u6cd5\u306f\u8fd1\u3005 5.1.x  \u7cfb\u306e <a href=\"https:\/\/growi.org\/ja\/\">GROWI<\/a> \u306b\u3082\u53cd\u6620\u3055\u308c\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/p>\n<p>\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u306f <a href=\"https:\/\/github.com\/weseek\/growi\/commit\/cbf1f2be380fd09765ea932a66b4fd3996da516a\">\u3053\u3061\u3089<\/a><\/p>\n<h2>\u65b9\u6cd52\u306e\u30c7\u30e1\u30ea\u30c3\u30c8<\/h2>\n<p>\u65b9\u6cd52 \u3067\u306f\u6728\u69cb\u9020\u30c7\u30fc\u30bf\u306e\u63a2\u7d22\u3084\u30bd\u30fc\u30c8\u306a\u3069\u306e\u8a08\u7b97\u3092\u5168\u3066 MongoDB \u306b\u80a9\u4ee3\u308f\u308a\u3057\u3066\u3082\u3089\u3044\u307e\u3059\u3002\u306a\u306e\u3067\u3001\u65b9\u6cd51\u3088\u308a\u306f MongoDB \u3078\u306e\u8ca0\u8377\u304c\u5927\u304d\u304f\u306a\u308b\u3068\u3044\u3046\u30c7\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e00\u822c\u7684\u306b\u3001RDBMS \u306e <a href=\"https:\/\/www.geeksforgeeks.org\/advantages-and-disadvantages-of-using-stored-procedures-sql\/\">stored procedures<\/a> \u306b\u4ee3\u8868\u3055\u308c\u308b\u3088\u3046\u306b\u96c6\u8a08\u7cfb\u306e\u51e6\u7406\u306f DB \u5074\u306b\u5bc4\u305b\u305f\u307b\u3046\u304c\u9ad8\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u751f\u3080\u3068\u8a00\u308f\u308c\u3066\u3044\u308b\u306e\u3067\u3001GROWI \u306e\u6700\u65b0\u7cfb\u3067\u306f\u65b9\u6cd52\u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002(5.1.x \u7cfb\u3092\u4e88\u5b9a)<\/p>\n<h1>\u307e\u3068\u3081<\/h1>\n<p>\u4eca\u56de\u306f2\u3064\u306e\u65b9\u6cd5\u3092\u4f7f\u3063\u3066 MongoDB \u306e\u6728\u69cb\u9020\u30e2\u30c7\u30eb\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3066\u307f\u307e\u3057\u305f\u3002\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u307e\u305f\u3001\u3088\u308a\u826f\u3044\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3057\u305f\u3089 <a href=\"https:\/\/twitter.com\/TaichiMasuyama\">\u5897\u5c71\u306e Twitter<\/a> \u306b DM \u3067\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7686\u3055\u3093\u3053\u3093\u306b\u3061\u306f\uff01WESEEK \u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a8\u30f3\u30b8\u30cb\u30a2\u306e \u5897\u5c71 \u3067\u3059\u3002 \u4eca\u56de\u306f\u3001MongoDB (mongoose) \u3067\u6728\u69cb\u9020\u306e\u30e2\u30c7\u30eb\u306e\u4f5c\u6210\u3068\u3001\u305d\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u53d6\u5f97\u6226\u7565\u306b\u3064\u3044\u3066\u8003\u3048\u307e\u3059\u3002 JavaScript \u306e As<\/p>\n","protected":false},"author":3,"featured_media":3186,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[29,105,168],"tags":[],"_links":{"self":[{"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/posts\/3184"}],"collection":[{"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/comments?post=3184"}],"version-history":[{"count":16,"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/posts\/3184\/revisions"}],"predecessor-version":[{"id":4012,"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/posts\/3184\/revisions\/4012"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/media\/3186"}],"wp:attachment":[{"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/media?parent=3184"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/categories?post=3184"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/weseek.co.jp\/tech\/wp-json\/wp\/v2\/tags?post=3184"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}