{"id":34357,"date":"2022-09-12T11:19:07","date_gmt":"2023-07-20T17:09:44","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e8%af%95%e7%9d%80%e5%b0%86-ecto-model-%e7%bc%93%e5%ad%98%e5%9c%a8-memcached-%e7%ad%89%e5%9c%b0%e6%96%b9%e3%80%82\/"},"modified":"2024-01-15T08:15:04","modified_gmt":"2024-01-15T00:15:04","slug":"%e8%af%95%e7%9d%80%e5%b0%86-ecto-model-%e7%bc%93%e5%ad%98%e5%9c%a8-memcached-%e7%ad%89%e5%9c%b0%e6%96%b9%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e8%af%95%e7%9d%80%e5%b0%86-ecto-model-%e7%bc%93%e5%ad%98%e5%9c%a8-memcached-%e7%ad%89%e5%9c%b0%e6%96%b9%e3%80%82\/","title":{"rendered":"\u8bd5\u7740\u5c06 Ecto Model \u7f13\u5b58\u5728 Memcached \u7b49\u5730\u65b9"},"content":{"rendered":"<h1>\u7f13\u5b58Ecto Model<\/h1>\n<p>\u5728\u8fd9\u91cc\u6211\u4eec\u5c06\u4f7f\u7528 memcache_client\u3002<\/p>\n<h2>\u4f8b\u5982\uff0c\u6709\u8fd9\u6837\u7684User\u6a21\u578b<\/h2>\n<pre class=\"post-pre\"><code>defmodule Models<span class=\"p\">.<\/span><span class=\"nb\">User<\/span> <span class=\"k\">do<\/span>\r\n  use Web<span class=\"p\">,<\/span> <span class=\"p\">:<\/span>model\r\n\r\n  schema <span class=\"s2\">\"users\"<\/span> <span class=\"k\">do<\/span>\r\n    field <span class=\"p\">:<\/span>username<span class=\"p\">,<\/span> <span class=\"p\">:<\/span><span class=\"nb\">string<\/span>\r\n    field <span class=\"p\">:<\/span>email<span class=\"p\">,<\/span> <span class=\"p\">:<\/span><span class=\"nb\">string<\/span>\r\n\r\n    timestamps\r\n  end\r\n\r\n  @required_fields <span class=\"p\">~<\/span><span class=\"k\">w<\/span><span class=\"p\">(<\/span>username email<span class=\"p\">)<\/span>\r\n  @optional_fields <span class=\"p\">~<\/span><span class=\"k\">w<\/span><span class=\"p\">()<\/span>\r\n\r\n  @doc <span class=\"s2\">\"\"<\/span>\"\r\n  Creates <span class=\"k\">a<\/span> changeset based <span class=\"k\">on<\/span> the `model` <span class=\"nb\">and<\/span> `params`<span class=\"p\">.<\/span>\r\n  If no params are provided<span class=\"p\">,<\/span> an invalid changeset <span class=\"k\">is<\/span> returned\r\n  with no validation performed<span class=\"p\">.<\/span>\r\n  <span class=\"c\">\"\"\"<\/span>\r\n  <span class=\"k\">def<\/span> changeset<span class=\"p\">(<\/span>model<span class=\"p\">,<\/span> params \\\\ <span class=\"p\">:<\/span><span class=\"nb\">empty<\/span><span class=\"p\">)<\/span> <span class=\"k\">do<\/span>\r\n    model\r\n    <span class=\"p\">|&gt;<\/span> cast<span class=\"p\">(<\/span>params<span class=\"p\">,<\/span> @required_fields<span class=\"p\">,<\/span> @optional_fields<span class=\"p\">)<\/span>\r\n  end\r\nend\r\n<\/code><\/pre>\n<h2>\u6211\u8bd5\u7740\u628a\u7528\u6237\u76f4\u63a5\u52a0\u8fdb\u6765\u3002<\/h2>\n<pre class=\"post-pre\"><code>iex(1)&gt; user = %Models.User{}\r\n%Models.User{__meta__: #Ecto.Schema.Metadata&lt;:built&gt;, username: nil, email: nil, inserted_at: nil, updated_at: nil}\r\n\r\niex(2)&gt; Memcache.Client.set(\"key\", user)\r\n** (ArgumentError) argument error\r\n    (memcache_client) lib\/memcache_client.ex:253: Memcache.Client.store_request\/4\r\n    (memcache_client) lib\/memcache_client.ex:242: Memcache.Client.do_store\/4\r\n<\/code><\/pre>\n<p>\u76f4\u63a5\u8f93\u5165\u53ef\u80fd\u4f1a\u5bfc\u81f4\u9519\u8bef\u53d1\u751f\u3002<\/p>\n<h2>\u5c06\u5176\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u5e76\u8fdb\u884c\u8bbe\u7f6e<\/h2>\n<pre class=\"post-pre\"><code>iex(3)&gt; data = :erlang.term_to_binary(user)\r\n&lt;&lt;131, 116, 0, 0, 0, 17, 100, 0, 8, 95, 95, 109, 101, 116, 97, 95, 95, 116, 0,\r\n  0, 0, 4, 100, 0, 10, 95, 95, 115, 116, 114, 117, 99, 116, 95, 95, 100, 0, 27,\r\n  69, 108, 105, 120, 105, 114, 46, 69, 99, 116, 111, 46, ...&gt;&gt;\r\n\r\niex(4)&gt; Memcache.Client.set(\"key\", data)\r\n%Memcache.Client.Response{cas: 1, data_type: nil, extras: \"\", key: \"\",\r\n status: :ok, value: \"\"}\r\n<\/code><\/pre>\n<h2>\u5728\u83b7\u53d6\u65f6\uff0c\u5c06\u4ece\u4e8c\u8fdb\u5236\u8f6c\u6362\u4e3a Ecto Model\u3002<\/h2>\n<pre class=\"post-pre\"><code>iex(5)&gt; response = Memcache.Client.get(\"key\")\r\n%Memcache.Client.Response{cas: 1, data_type: 0, extras: &lt;&lt;0, 0, 0, 0&gt;&gt;, key: \"\",\r\n status: :ok,\r\n value: &lt;&lt;131, 116, 0, 0, 0, 17, 100, 0, 8, 95, 95, 109, 101, 116, 97, 95, 95,\r\n   116, 0, 0, 0, 4, 100, 0, 10, 95, 95, 115, 116, 114, 117, 99, 116, 95, 95,\r\n   100, 0, 27, 69, 108, 105, 120, 105, 114, 46, ...&gt;&gt;}\r\n\r\niex(6)&gt; user = :erlang.binary_to_term(response.value)\r\n%Models.User{__meta__: #Ecto.Schema.Metadata&lt;:built&gt;, username: nil, email: nil, inserted_at: nil, updated_at: nil}\r\n<\/code><\/pre>\n<p>\u5982\u679c\u5c06\u5176\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\uff0c\u65e0\u8bba\u662fMap\u8fd8\u662fStruct\uff0c\u90fd\u53ef\u4ee5\u5c06\u5176\u8bbe\u7f6e\u5230memcache\u6216redis\u4e2d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7f13\u5b58Ecto Model \u5728\u8fd9\u91cc\u6211\u4eec\u5c06\u4f7f\u7528 memcache_client\u3002 \u4f8b\u5982\uff0c\u6709\u8fd9\u6837\u7684User\u6a21\u578b de [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-34357","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u8bd5\u7740\u5c06 Ecto Model \u7f13\u5b58\u5728 Memcached \u7b49\u5730\u65b9 - 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