{"id":208262,"date":"2025-07-08T12:51:11","date_gmt":"2025-07-08T04:51:11","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208262\/"},"modified":"2025-07-08T12:51:11","modified_gmt":"2025-07-08T04:51:11","slug":"%e4%bd%bf%e7%94%a8-mongo-driver-%e8%87%aa%e5%ae%9a%e4%b9%89-bson-%e7%bc%96%e7%bb%84%e5%92%8c%e8%a7%a3%e7%bb%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208262\/","title":{"rendered":"\u4f7f\u7528 mongo-driver \u81ea\u5b9a\u4e49 BSON \u7f16\u7ec4\u548c\u89e3\u7ec4"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4f7f\u7528 mongo-driver \u81ea\u5b9a\u4e49 BSON \u7f16\u7ec4\u548c\u89e3\u7ec4<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-30 22:03:25<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u6765\u5230\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60Golang\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300a\u4f7f\u7528 mongo-driver \u81ea\u5b9a\u4e49 BSON \u7f16\u7ec4\u548c\u89e3\u7ec4\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

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

\u6211\u6709\u4e00\u4e2a\u5982\u4e0b\u6240\u793a\u7684\u7ed3\u6784\u5b57\u6bb5\u3002\u6211\u8fd8\u5c06\u76f8\u540c\u7ed3\u6784\u7684\u539f\u59cb protobuf \u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u3002\u73b0\u5728\u6bcf\u6b21\u83b7\u53d6\u6216\u4fdd\u5b58\u6570\u636e\u5230 mongo \u65f6\u3002\u5f53\u6211\u60f3\u4fdd\u5b58\u5230\u6570\u636e\u5e93\u65f6\uff0c\u6211\u5fc5\u987b\u4ece\u539f\u578b\u66f4\u65b0 reallybigraw<\/code>\uff0c\u5f53\u6211\u60f3\u4fdd\u5b58\u5230\u6570\u636e\u5e93\u65f6\uff0c\u6211\u5fc5\u987b\u5c06 reallybigraw<\/code> \u89e3\u7ec4\u5230 reallybigobj<\/code> \u4ee5\u7ed9\u51fa\u54cd\u5e94\u3002\u6709\u6ca1\u6709\u529e\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e9b\u63a5\u53e3\u6216\u63d0\u4f9b\u4e00\u4e9b\u56de\u8c03\u51fd\u6570\uff0c\u4ee5\u4fbf mongo \u9a71\u52a8\u7a0b\u5e8f\u5728\u4fdd\u5b58\u6216\u4ece\u6570\u636e\u5e93\u83b7\u53d6\u6570\u636e\u4e4b\u524d\u81ea\u52a8\u6267\u884c\u6b64\u64cd\u4f5c\u3002<\/p>\n

\u53e6\u5916\uff0c\u6211\u4f7f\u7528\u7684\u662f\u5b98\u65b9 golang mongo \u9a71\u52a8\u7a0b\u5e8f\u800c\u4e0d\u662f mgo<\/code>\uff0c\u6211\u5df2\u7ecf\u9605\u8bfb\u4e86\u4e00\u4e9b\u53ef\u4ee5\u5728 mgo<\/code> golang \u5e93\u4e2d\u5b8c\u6210\u7684\u7b54\u6848\u3002<\/p>\n

import (\n    \"github.com\/golang\/protobuf\/jsonpb\"\n    \"go.mongodb.org\/mongo-driver\/bson\"\n    \"go.mongodb.org\/mongo-driver\/bson\/primitive\"\n\n    proto \"github.com\/dinesh\/api\/go\"\n)\n\ntype ReallyBig struct {\n    ID           string                 `bson:\"_id,omitempty\"`\n    DraftID      string                 `bson:\"draft_id,omitempty\"`\n\/\/ Marshaled ReallyBigObj proto to map[string]interface{} stored in DB\n    ReallyBigRaw map[string]interface{} `bson:\"raw,omitempty\"`\n    ReallyBigObj *proto.ReallyBig       `bson:\"-\"`\n    CreatedAt    primitive.DateTime     `bson:\"created_at,omitempty\"`\n    UpdatedAt    primitive.DateTime     `bson:\"updated_at,omitempty\"`\n}\n\nfunc (r *ReallyBig) GetProto() (*proto.ReallyBig, error) {\n    if r.ReallyBigObj != nil {\n        return r.ReallyBigObj, nil\n    }\n    Obj, err := getProto(r.ReallyBigRaw)\n    if err != nil {\n        return nil, err\n    }\n    r.ReallyBigObj = Obj\n    return r.ReallyBigObj, nil\n}\n\nfunc getRaw(r *proto.ReallyBig) (map[string]interface{}, error) {\n    m := jsonpb.Marshaler{}\n    b := bytes.NewBuffer([]byte{})\n\n    \/\/ marshals proto to json format\n    err := m.Marshal(b, r)\n    if err != nil {\n        return nil, err\n    }\n    var raw map[string]interface{}\n    \/\/ unmarshal the raw data to an interface\n    err = json.Unmarshal(b.Bytes(), &raw)\n    if err != nil {\n        return nil, err\n    }\n    return raw, nil\n}\n\nfunc getProto(raw map[string]interface{}) (*proto.ReallyBig, error) {\n    b, err := json.Marshal(raw)\n    if err != nil {\n        return nil, err\n    }\n    u := jsonpb.Unmarshaler{}\n    var reallyBigProto proto.ReallyBig\n    err = u.Unmarshal(bytes.NewReader(b), &recipeProto)\n    if err != nil {\n        return nil, err\n    }\n    return &reallyBigProto, nil\n}\n<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u6211\u5b9e\u73b0\u4e86 marshaler<\/code> \u548c unmarshaler<\/code> \u63a5\u53e3\u3002\u7531\u4e8e mongo \u9a71\u52a8\u7a0b\u5e8f\u8c03\u7528 marshalbson<\/code> \u548c unmarshalbson<\/code> \uff08\u5982\u679c\u7c7b\u578b\u5b9e\u73b0 marshaler<\/code> \u548c unmarshaler<\/code>\uff09\uff0c\u6211\u4eec\u4e5f\u4f1a\u9677\u5165\u65e0\u9650\u5faa\u73af\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u6211\u4eec\u521b\u5efa\u4e86 type<\/code> \u7684\u522b\u540d\u3002 golang<\/code> \u4e2d\u7684\u522b\u540d\u4ec5\u7ee7\u627f\u5b57\u6bb5\u800c\u4e0d\u7ee7\u627f\u65b9\u6cd5\uff0c\u56e0\u6b64\u6211\u4eec\u6700\u7ec8\u8c03\u7528\u6b63\u5e38\u7684 bson.marshal<\/code> \u548c bson.unmarshal<\/code><\/p>\n
func (r *ReallyBig) MarshalBSON() ([]byte, error) {\n    type ReallyBigAlias ReallyBig\n    reallyBigRaw, err := getRaw(r.ReallyBigObj)\n    if err != nil {\n        return nil, err\n    }\n    r.ReallyBigRaw = reallyBigRaw\n    return bson.Marshal((*ReallyBigAlias)(r))\n}\n\nfunc (r *ReallyBig) UnmarshalBSON(data []byte) error {\n    type ReallyBigAlias ReallyBig\n    err := bson.Unmarshal(data, (*ReallyBigAlias)(r))\n    if err != nil {\n        return err\n    }\n    reallyBigProto, err := getProto(r.ReallyBigRaw)\n    if err != nil {\n        return err\n    }\n    r.ReallyBigObj = reallyBigProto\n    return nil\n}\n<\/pre>\n
\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u4f7f\u7528 mongo-driver \u81ea\u5b9a\u4e49 BSON \u7f16\u7ec4\u548c\u89e3\u7ec4\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGolang\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-208262","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208262","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208262"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208262\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}