{"id":44757,"date":"2023-09-01T08:40:13","date_gmt":"2023-02-03T19:30:02","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/44757-2\/"},"modified":"2024-04-30T21:04:02","modified_gmt":"2024-04-30T13:04:02","slug":"44757-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/44757-2\/","title":{"rendered":""},"content":{"rendered":"

Go \u8a00\u8a9e\uff08\u4ee5\u4e0b golang\uff09\u3067\u3001\u30c7\u30fc\u30bf\u306e\u30d1\u30fc\u30b9\u7528\u306b\u8907\u6570\u306e\u69cb\u9020\u4f53\uff08\u4ee5\u4e0b struct\uff09\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u3044\u3002<\/p><\/blockquote>\n

JSON \u30c7\u30fc\u30bf\u3092\u30d1\u30fc\u30b9\u3057\u305f\u3044\u306e\u3067\u3059\u304c\u3001JSON \u5074\u306e\u4ed5\u69d8\u304c\u6574\u3063\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u5fae\u5999\u306b\u7570\u306a\u308b\u3082\u3001\u307b\u307c\u540c\u3058 struct \u3092\u8907\u6570\u7528\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n

\u30b7\u30f3\u30d7\u30eb\u306a\u69cb\u9020\u4f53\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u30c0\u30a4\u30ca\u30df\u30c3\u30af\uff08\u52d5\u7684\uff09\u306b struct \u3092\u4f5c\u308a\u305f\u3044\u306e\u3067\u3059\u304c\u3001\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u3068\u8a00\u3063\u3066\u3082 reflection \u306a\u3069\u3092\u4f7f\u3046\u30ec\u30d9\u30eb\u3067\u306f\u306a\u304f string \u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u307f\u3067\u5341\u5206\u306a\u306e\u3067\u3059\u3002<\/p>\n

\u300cgolang struct \u30de\u30fc\u30b8\u300d\u3068\u30b0\u30b0\u3063\u3066\u3082\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u30bf\u30a4\u30c8\u30eb\u3084\u7528\u9014\u306e Qiita \u8a18\u4e8b\u304c\u30d2\u30c3\u30c8\u3057\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u81ea\u5206\u306e\u30b0\u30b0\u30e9\u30d3\u30ea\u30c6\u30a3\u3068\u3057\u3066\u3002<\/p>\n

TL; DR \uff08\u4eca\u5317\u7523\u696d\uff09<\/h2>\n

Embedded Struct\uff08\u69cb\u9020\u4f53\u306e\u57cb\u3081\u8fbc\u307f\uff09\u3067\u3088\u304b\u3063\u305f\u3002<\/p><\/blockquote>\n

\u5fae\u5999\u306b\u9055\u3046\u69cb\u9020\u306e JSON \u30c7\u30fc\u30bf<\/p>\n

\u30d1\u30fc\u30b9\u3057\u305f\u3044\u30c7\u30fc\u30bf\u4f8b
\ndata1 := `{
\n“hoge”: “hoge hoge”,
\n“fuga”: “fuga fuga”
\n}`<\/p>\n

data2 := `{
\n“hoge”: “hoge hoge hoge”,
\n“piyo”: “piyo piyo”
\n}`<\/p>\n

\u7d44\u307f\u5408\u308f\u305b\u7528\u306e\u5c0f\u3055\u306a\u69cb\u9020\u4f53
\ntype Foo struct {
\nHoge string `json:”hoge”`
\n}<\/p>\n

type Bar struct {
\nFuga string `json:”fuga”`
\n}<\/p>\n

type Buz struct {
\nPiyo string `json:”piyo”`
\n}<\/p>\n

\u9069\u5b9c\u30d1\u30bf\u30fc\u30f3\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u30d1\u30fc\u30b9
\nmix := new(struct {
\nFoo
\nBar
\n})<\/p>\n

if err := json.Unmarshal([]byte(data1), mix); err != nil {
\npanic(err)
\n}<\/p>\n

\n

\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u30b7\u30f3\u30d7\u30eb\u306a\u69cb\u9020\u306e\u30c7\u30fc\u30bf\u3092\u30d1\u30fc\u30b9\u3059\u308b\u5834\u5408\u306b\u306f\u9069\u3057\u3066\u307e\u3059\u304c\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u7d61\u3081\u305f\u308a\u3001\u9006\u306e JSON \u30c7\u30fc\u30bf\u51fa\u529b\uff08Marshal\uff09\u3068\u3044\u3063\u305f\u3001\u3061\u3087\u3063\u3068\u8907\u96d1\u306a\u3053\u3068\u3092\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u3059\u3050\u306b\u9650\u754c\u304c\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n

TS; DR<\/h2>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n\t\"encoding\/json\"<\/span>\r\n\t\"fmt\"<\/span>\r\n)<\/span>\r\n\r\ntype<\/span> Foo<\/span> struct<\/span> {<\/span>\r\n\tHoge<\/span> string<\/span> `json:\"hoge\"`<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Bar<\/span> struct<\/span> {<\/span>\r\n\tFuga<\/span> string<\/span> `json:\"fuga\"`<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Buz<\/span> struct<\/span> {<\/span>\r\n\tPiyo<\/span> string<\/span> `json:\"piyo\"`<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n\t\/\/ \u5fae\u5999\u306b\u9055\u3046 JSON \u30c7\u30fc\u30bf<\/span>\r\n\tdata1<\/span> :=<\/span> `{\r\n\t\t\"hoge\": \"hoge hoge\",\r\n\t\t\"fuga\": \"fuga fuga\"\r\n\t}`<\/span>\r\n\r\n\tdata2<\/span> :=<\/span> `{\r\n\t\t\"hoge\": \"hoge hoge hoge\",\r\n\t\t\"piyo\": \"piyo piyo\"\r\n\t}`<\/span>\r\n\r\n\t\/\/ \u30d1\u30bf\u30fc\u30f31\u3092\u30d1\u30fc\u30b9\u3057\u3066\u30d7\u30ea\u30f3\u30c8<\/span>\r\n\tmix1<\/span> :=<\/span> new<\/span>(<\/span>struct<\/span> {<\/span>\r\n\t\tFoo<\/span>\r\n\t\tBar<\/span>\r\n\t})<\/span>\r\n\r\n\tif<\/span> err<\/span> :=<\/span> json<\/span>.<\/span>Unmarshal<\/span>([]<\/span>byte<\/span>(<\/span>data1<\/span>),<\/span> mix1<\/span>);<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n\t\tpanic<\/span>(<\/span>err<\/span>)<\/span>\r\n\t}<\/span>\r\n\r\n\tfmt<\/span>.<\/span>Println<\/span>(<\/span>\"Mix1:\"<\/span>,<\/span> mix1<\/span>.<\/span>Hoge<\/span>,<\/span> mix1<\/span>.<\/span>Fuga<\/span>)<\/span>\r\n\r\n\t\/\/ \u30d1\u30bf\u30fc\u30f32\u3092\u30d1\u30fc\u30b9\u3057\u3066\u30d7\u30ea\u30f3\u30c8<\/span>\r\n\tmix2<\/span> :=<\/span> new<\/span>(<\/span>struct<\/span> {<\/span>\r\n\t\tFoo<\/span>\r\n\t\tBuz<\/span>\r\n\t})<\/span>\r\n\r\n\tif<\/span> err<\/span> :=<\/span> json<\/span>.<\/span>Unmarshal<\/span>([]<\/span>byte<\/span>(<\/span>data2<\/span>),<\/span> mix2<\/span>);<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n\t\tpanic<\/span>(<\/span>err<\/span>)<\/span>\r\n\t}<\/span>\r\n\r\n\tfmt<\/span>.<\/span>Println<\/span>(<\/span>\"Mix2:\"<\/span>,<\/span> mix2<\/span>.<\/span>Hoge<\/span>,<\/span> mix2<\/span>.<\/span>Piyo<\/span>)<\/span>\r\n\t\r\n\t\/\/ Output:<\/span>\r\n\t\/\/ Mix1: hoge hoge fuga fuga<\/span>\r\n\t\/\/ Mix2: hoge hoge hoge piyo piyo<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u52d5\u4f5c\u3092\u307f\u308b @ GoPlayground<\/p>\n
\u53c2\u8003\u6587\u732e<\/h2>\n
Embedding | Effective Go @ go.dev<\/p>\n
How can I merge two structs in Golang? @ StackOverflow<\/p>\n","protected":false},"excerpt":{"rendered":"
Go \u8a00\u8a9e\uff08\u4ee5\u4e0b golang\uff09\u3067\u3001\u30c7\u30fc\u30bf\u306e\u30d1\u30fc\u30b9\u7528\u306b\u8907\u6570\u306e\u69cb\u9020\u4f53\uff08\u4ee5\u4e0b struct\uff09\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u3044\u3002 J […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44757","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/44757-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"Go \u8a00\u8a9e\uff08\u4ee5\u4e0b golang\uff09\u3067\u3001\u30c7\u30fc\u30bf\u306e\u30d1\u30fc\u30b9\u7528\u306b\u8907\u6570\u306e\u69cb\u9020\u4f53\uff08\u4ee5\u4e0b struct\uff09\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u3044\u3002 J […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/44757-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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