{"id":42060,"date":"2024-12-01T12:41:40","date_gmt":"2024-12-01T04:41:40","guid":{"rendered":"https:\/\/fwq.ai\/blog\/42060\/"},"modified":"2024-12-01T12:41:40","modified_gmt":"2024-12-01T04:41:40","slug":"golang%e9%80%9a%e7%94%a8%e6%95%b0%e6%8d%ae%e5%ba%93%e5%8d%95%e8%ae%b0%e5%bd%95%e8%bd%acjson","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/42060\/","title":{"rendered":"Golang\u901a\u7528\u6570\u636e\u5e93\u5355\u8bb0\u5f55\u8f6cjson"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Golang\u901a\u7528\u6570\u636e\u5e93\u5355\u8bb0\u5f55\u8f6cjson<\/span><\/p>\n

Golang\u901a\u7528\u6570\u636e\u5e93\u5355\u8bb0\u5f55\u8f6cjson<\/h1>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-22 14:36:34<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4f60\u5728\u5b66\u4e60Golang<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\u300aGolang\u901a\u7528\u6570\u636e\u5e93\u5355\u8bb0\u5f55\u8f6cjson\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230<\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u60f3\u4ece\u6570\u636e\u5e93\u4e2d\u68c0\u7d22\u8bb0\u5f55\u5e76\u5c06\u5176\u7f16\u7ec4\u4e3a json\u3002 \u6211\u6709\u5927\u7ea6 30 \u4e2a\u4e0d\u540c\u7684\u8868\uff0c\u56e0\u6b64\u6211\u60f3\u8981\u9002\u7528\u4e8e\u6240\u6709\u6216\u4efb\u4f55\u8fd9\u4e9b\u8868\u7684\u901a\u7528\u51fd\u6570\u3002\u6211\u4f7f\u7528 xorm \u8fdb\u884c\u6570\u636e\u5e93\u8bbf\u95ee\u3002<\/p>\n

\u6211\u5df2\u7ecf\u6210\u529f\u521b\u5efa\u4e86\u68c0\u7d22\u6570\u636e\u7684 dry \u51fd\u6570\uff0c\u8fd9\u4e3b\u8981\u5f52\u529f\u4e8e\u8fd9\u4e2a\u95ee\u9898\u548c\u7b54\u6848<\/p>\n

\u8fd9\u6709\u6548\uff0c\u53ef\u4ee5\u5c06\u6240\u6709\u8bb0\u5f55\u7f16\u7ec4\u4e3a json\uff1a<\/p>\n

type user struct {\n   id   int64  `json:\"id\"`\n   name string `json:\"name\"`\n}\n\/\/ type post\n\/\/ etc.\n\ntype tablerecord struct {\n    primarykey string\n    data       interface{}\n}\n\nvar listoftables = map[string]tablerecord{\n    \"users\":{\"id\", &[]user{}},  \/\/ type user is struct for xorm with json annotation\n    \/\/\"posts\":{\"post_id\", &[]post{}},\n    \/\/ etc.. \n}\n\nfor tablename, rec := range listoftables {\n    err := xorm.find(rec.data)\n    if err != nil {\n        log.print(err)\n    }\n\n    out, err := json.marshal(rec.data)\n    if err != nil {\n        log.print(err)\n    }\n    log.print(string(out)) \/\/ this yields json array\n}<\/pre>\n
\u4f46\u662f\uff0c\u6211\u5f88\u96be\u5c06\u5355\u4e2a\u8bb0\u5f55\u7f16\u7ec4\u4e3a json\u3002 \u6211\u4e00\u76f4\u5728\u5bfb\u627e\u8fed\u4ee3\u6301\u6709\u5207\u7247\u7684\u63a5\u53e3{}\u7684\u65b9\u6cd5\uff0c\u627e\u5230\u4e86\u8fd9\u4e2a\u548c\u7c7b\u4f3c\u7684\u4e3b\u9898\u3002\u5c1d\u8bd5\u8fc7\uff1a<\/p>\n
switch reflect.typeof(reflect.valueof(rec.data).elem().interface()).kind() {\ncase reflect.slice:\n    s := reflect.valueof(reflect.valueof(rec.data).elem().interface())\n    for i := 0; i < s.len(); i++ {\n        entry := s.index(i)\n        log.printf(\"%v\\n\", entry) \/\/ prints {1 john doe}\n        \/\/ log.print(reflect.valueof(entry))\n        data, err := json.marshalindent(entry, \" \", \"  \")\n        if err != nil {\n            log.print(err)\n        }\n        log.println(string(data)) \/\/ prints {} empty\n    }\n}<\/pre>\n
\u5f53\u7136\uff0c\u5982\u679c\u6211\u6307\u5b9a rec.data<\/code> \u662f *[]user<\/code> \u5b83\u53ef\u4ee5\u5de5\u4f5c\uff0c\u4f46\u968f\u540e\u6211\u5fc5\u987b\u4e3a\u6bcf\u4e2a\u8868\u91cd\u5199\u8fd9\u6837\u7684\u4ee3\u7801\uff0c\u8fd9\u4e0d\u662f\u6211\u60f3\u8981\u7684\u3002<\/p>\n
switch t := rec.data.(type) {\ncase *[]user:\n    for _, entry := range *t {\n        \/\/ log.printf(\"loop %v\", entry)\n        data, err := json.marshalindent(entry, \" \", \"  \")\n        if err != nil {\n            log.print(err)\n        }\n        log.println(string(data)) \/\/ yields needed json for single record\n    }\n}<\/pre>\n
\u6216\u8005\u4e5f\u8bb8\u6709\u4e00\u79cd\u5b8c\u5168\u4e0d\u540c\u7684\u3001\u66f4\u597d\u7684\u65b9\u6cd5\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898 – \u6570\u636e\u5e93\u7684\u4efb\u4f55\u8bb0\u5f55\u5230 json\u3002<\/p>\n
\u66f4\u65b0<\/strong> \u73b0\u5728\u7684\u95ee\u9898\u662f\uff0cxorm \u9700\u8981\u8be5\u7ed3\u6784\u5417\uff1f\u6211\u5c06\u4e0d\u5f97\u4e0d\u9605\u8bfb xorm \u7684\u53ef\u80fd\u6027\u548c\u5c40\u9650\u6027\u3002<\/p>\n
slice := record.Slice()\nlog.Print(reflect.TypeOf(slice))\n\nerr = env.hxo.In(record.PrimaryKey(), insertIds).Find(slice) \/\/ or &slice\nif err != nil {\n    log.Print(err) \/\/ Table not found\n}\n\n\/\/ this works\nvar slice2 []*user\nerr = env.hxo.In(record.PrimaryKey(), insertIds).Find(&slice2)\nif err != nil {\n    log.Print(err) \/\/ \n}<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u56e0\u6b64\uff0c\u6b63\u5982\u6211\u5728\u8bc4\u8bba\u4e2d\u63d0\u5230\u7684\uff0c\u5982\u679c\u60a8\u5e0c\u671b\u80fd\u591f\u4ece tablerecord.data<\/code> \u5b57\u6bb5\u83b7\u53d6\u5355\u4e2a\u5143\u7d20\uff0c\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u5c06\u5b57\u6bb5\u7c7b\u578b\u66f4\u6539\u4e3a\u5b9e\u9645\u7c7b\u578b\uff1a<\/p>\n
type tablerecord struct {\n    primarykey string\n    data       []interface{} \/\/ slice of whatever\n}<\/pre>\n
\u8fd9\u6837\uff0c\u60a8\u5c31\u53ef\u4ee5\u7f16\u5199\u4e00\u4e9b\u975e\u5e38\u901a\u7528\u7684\u5185\u5bb9\uff1a<\/p>\n
for tbl, record := range records {\n    fmt.printf(\"first record from table %s\\n\", tbl)\n    b, _ := json.marshalindent(record[0], \" \", \"  \")\n    fmt.println(string(b))\n    fmt.prinln(\"other records...\")\n    b, _ = json.marshalindend(record[1:], \" \", \"  \")\n    fmt.println(string(b))\n}<\/pre>\n
\u4e0d\u8fc7\uff0c\u5982\u679c\u6211\u662f\u4f60\uff0c\u6211\u4f1a\u8003\u8651\u5728\u6211\u7684\u6570\u636e\u5e93\u7c7b\u578b\u4e2d\u5b9e\u73b0\u4e00\u4e2a\u63a5\u53e3\u3002\u5927\u81f4\u5982\u4e0b\uff1a<\/p>\n
type dbtype interface {\n    primarykey() string\n    tablename() string \/\/ xorm can use this to get the table name\n    slice() []dbtype \/\/ can return []user or whatever\n}<\/pre>\n
\u6240\u4ee5\u4f60\u771f\u7684\u4e0d\u518d\u9700\u8981 tablerecord<\/code> \u7c7b\u578b\uff0c\u5e76\u4e14\u53ef\u4ee5\u4f7f\u7528\u8fd9\u6837\u7684 var\uff1a<\/p>\n
listoftables := []dbtype{user{}, ...}\nfor _, tbl := range listoftables {\n    data := tbl.slice()\n    \/\/ find data here\n    fmt.printf(\"first record from table %s\\n\", tbl.tablename())\n    b, _ := json.marshalindent(data[0], \" \", \"  \")\n    fmt.println(string(b))\n    fmt.prinln(\"other records...\")\n    b, _ = json.marshalindend(data[1:], \" \", \"  \")\n    fmt.println(string(b))\n}<\/pre>\n
\u6240\u4ee5\uff0c\u6211\u7684\u56de\u7b54\/\u8bc4\u8bba\u4e2d\u7f3a\u5c11\u7684\u5185\u5bb9\u662f tl;dr\uff1a<\/p>\n
    \n
  • \n
    \u4ece\u7c7b\u578b []user{}<\/code>\uff08\u6216 []dbtable<\/code>\uff09\u5230 []interface{}<\/code> \u4e0d\u8d77\u4f5c\u7528\uff0c\u56e0\u4e3a\u60a8\u65e0\u6cd5\u5c06\u5207\u7247\u4e2d\u7684\u6240\u6709\u5143\u7d20\u8f6c\u6362\u4e3a\u4e00\u4e2a\u5355\u4e00\u7684\u8868\u8fbe\u3002\u60a8\u5fc5\u987b\u521b\u5efa []interface{}<\/code> \u7c7b\u578b\u7684\u7b2c\u4e8c\u4e2a\u5207\u7247\u5e76\u590d\u5236\u503c\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
    slice := uservar.slice() \u6570\u636e := make([]interface{}, len(slice)) for i := \u8303\u56f4\u5207\u7247 { data[i] = slice[i] \/\/ \u5c06\u7c7b\u578b\u590d\u5236\u5230 interface{} slice } \u8fd4\u56de tablerecord{uservar.primarykey(), data}<\/p>\n<\/li>\n<\/ul>\n
    \u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u5c0f\u578b\u5de5\u4f5c\u793a\u4f8b\uff0c\u8bf4\u660e\u5982\u4f55\u4f7f\u7528\u4e0a\u8ff0\u63a5\u53e3\u3002 <\/p>\n
    <\/h2>\n
    \u4e3a\u4e86\u907f\u514d\u592a\u591a\u6df7\u4e71\uff0c\u60a8\u53ef\u4ee5\u66f4\u6539 slice<\/code> \u51fd\u6570\u4ee5\u7acb\u5373\u8fd4\u56de []interface{}<\/code>\uff1a<\/p>\n
    func(v t) slice() []interface{\n    return []interface{\n        &t{},\n    }\n}<\/pre>\n
    \u60a8\u7684 slice<\/code> \u5b9e\u73b0\u7684\u95ee\u9898\u5728\u4e8e\u60a8\u6709\u5982\u4e0b\u5185\u5bb9\uff1a<\/p>\n
    func (u *user) slice() []dbtable {\n    u = &user{} \/\/ you're re-assigning the receiver, losing all state!\n    return []dbtable{u}\n}<\/pre>\n
    \u63a5\u6536\u5668\u662f\u6307\u9488\u7c7b\u578b\uff0c\u56e0\u6b64\u60a8\u6240\u505a\u7684\u4efb\u4f55\u91cd\u65b0\u5206\u914d\u90fd\u4f1a\u5f71\u54cd\u8c03\u7528 func \u7684\u53d8\u91cf\u3002\u8fd9\u4e0d\u662f\u4e00\u4e2a\u597d\u4e3b\u610f\u3002\u53ea\u9700\u4f7f\u7528\u503c\u63a5\u6536\u5668\uff0c\u6216\u8005\uff0c\u5982\u679c\u60a8\u60f3\u786e\u4fdd\u63a5\u53e3\u4ec5\u5728\u6307\u9488\u53d8\u91cf\u4e0a\u5b9e\u73b0\uff08\u5e38\u89c1\u6280\u5de7\uff0c\u4f8b\u5982 grpc \u4f7f\u7528\u7684\u6280\u5de7\uff09\u5c31\u662f\u5b9e\u73b0\u5982\u4e0b\u6240\u793a\u7684\u51fd\u6570\uff1a<\/p>\n
    func(*user) slice() []dbtable{\n    return []dbtable{&user{}}\n}<\/pre>\n
    \u4f7f\u7528\u534f\u8bae\u7f13\u51b2\u533a\u65f6\u751f\u6210\u7684 pb.go<\/code> \u6587\u4ef6\u4e2d\u53ef\u4ee5\u627e\u5230\u6b64\u6280\u5de7\u7684\u4e00\u4e2a\u5f88\u597d\u7684\u793a\u4f8b\u3002\u6d88\u606f\u7c7b\u578b\u5c06\u5177\u6709\u5982\u4e0b\u529f\u80fd\uff1a<\/p>\n
    func(*MsgType) ProtoMessage() {}<\/pre>\n
    \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u7c73\u4e91\uff01\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5f53\u524d\u4f4d\u7f6e\uff1a > > > > Golang\u901a\u7528\u6570\u636e\u5e93\u5355\u8bb0\u5f55\u8f6cjson Golang\u901a\u7528\u6570\u636e\u5e93\u5355\u8bb0\u5f55\u8f6cjson \u6765\u6e90\uff1astackoverflow 2024-04-22 14:36:34 0\u6d4f\u89c8 \u6536\u85cf \u4f60\u5728\u5b66\u4e60Golang\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\u300aGolang\u901a\u7528\u6570\u636e\u5e93\u5355\u8bb0\u5f55\u8f6cjson\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01 \u95ee\u9898\u5185\u5bb9 \u6211\u60f3\u4ece\u6570\u636e\u5e93\u4e2d\u68c0\u7d22\u8bb0\u5f55\u5e76\u5c06\u5176\u7f16\u7ec4\u4e3a json\u3002 \u6211\u6709\u5927\u7ea6 30 \u4e2a\u4e0d\u540c\u7684\u8868\uff0c\u56e0\u6b64\u6211\u60f3\u8981\u9002\u7528\u4e8e\u6240\u6709\u6216\u4efb\u4f55\u8fd9\u4e9b\u8868\u7684\u901a\u7528\u51fd\u6570\u3002\u6211\u4f7f\u7528 xorm \u8fdb\u884c\u6570\u636e\u5e93\u8bbf\u95ee\u3002 \u6211\u5df2\u7ecf\u6210\u529f\u521b\u5efa\u4e86\u68c0\u7d22\u6570\u636e\u7684 dry \u51fd\u6570\uff0c\u8fd9\u4e3b\u8981\u5f52\u529f\u4e8e\u8fd9\u4e2a\u95ee\u9898\u548c\u7b54\u6848 \u8fd9\u6709\u6548\uff0c\u53ef\u4ee5\u5c06\u6240\u6709\u8bb0\u5f55\u7f16\u7ec4\u4e3a json\uff1a type user struct { id int64 `json:”id”` name string `json:”name”` } \/\/ type post \/\/ etc. type tablerecord struct { primarykey string data interface{} } var listoftables = map[string]tablerecord{ […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-42060","post","type-post","status-publish","format-standard","hentry","category-docker"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/42060","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=42060"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/42060\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=42060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=42060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=42060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}