mongodb基于golang的官方driver

四颗豆 · · 452 次点击 · · 开始浏览    

直接奉上代码:

// +build !test

package mongo

import (
    "context"
    "runtime/debug"
    "sync"
    "time"

    "go.mongodb.org/mongo-driver/bson"
    "go.mongodb.org/mongo-driver/bson/primitive"
    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

type BaseEntity interface {
    GetId() string
    SetId(id string)
}

type PageFilter struct {
    SortBy     string
    SortMode   int8
    Limit      *int64
    Skip       *int64
    Filter     map[string]interface{}
    RegexFiler map[string]string
}

type MongoClient struct {
    Client *mongo.Client
    Ctx    context.Context
}

var Mongo *MongoClient

func init() {

    var once sync.Once
    once.Do(func() {
        ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
        defer cancel() // bug may happen
        if client, err := mongo.Connect(ctx, options.Client().ApplyURI(Conf.String("mongo::uri"))); err == nil {
            Mongo = &MongoClient{}
            Mongo.Ctx = ctx
            Mongo.Client = client
        }
    })
}

func (m *MongoClient) Create(collection string, e BaseEntity) (error, string) {
    var err error
    defer func() {
        if r := recover(); r != nil {
            var ok bool
            err, ok = r.(error)
            if !ok {
                debug.PrintStack()
            }
        }
    }()
    collections := m.Client.Database(Conf.String("mongo::db")).Collection(collection)
    e.SetId(UUID())
    if cid, err := collections.InsertOne(m.Ctx, e); err == nil {
        return nil, cid.InsertedID.(primitive.ObjectID).Hex()
    }
    return err, ""
}

func (m *MongoClient) Get(collection, id string) (err error, e BaseEntity) {
    defer func() {
        if r := recover(); r != nil {
            var ok bool
            err, ok = r.(error)
            if !ok {
                debug.PrintStack()
            }
        }
    }()
    collections := m.Client.Database(Conf.String("mongo::db")).Collection(collection)
    objID, _ := primitive.ObjectIDFromHex(id)
    result := collections.FindOne(m.Ctx, bson.M{"_id": objID})
    result.Decode(&e)
    return
}

func (m *MongoClient) GetOne(collection, id string) (err error, e interface{}) {
    defer func() {
        if r := recover(); r != nil {
            var ok bool
            err, ok = r.(error)
            if !ok {
                debug.PrintStack()
            }
        }
    }()
    collections := m.Client.Database(Conf.String("mongo::db")).Collection(collection)
    result := collections.FindOne(m.Ctx, bson.M{"Id": id})
    result.Decode(&e)
    return
}

func (m *MongoClient) Count(collection string, filter PageFilter) (err error, c int64) {
    defer func() {
        if r := recover(); r != nil {
            var ok bool
            err, ok = r.(error)
            if !ok {
                debug.PrintStack()
            }
        }
    }()
    if filter.RegexFiler != nil {
        for k, v := range filter.RegexFiler {
            filter.Filter[k] = primitive.Regex{Pattern: v, Options: ""}
        }
    }
    collections := m.Client.Database(Conf.String("mongo::db")).Collection(collection)
    collections.CountDocuments(m.Ctx, filter.Filter, &options.CountOptions{Skip: filter.Skip, Limit: filter.Limit})
    return
}

func (m *MongoClient) List(collection string, filter PageFilter) (err error, e []interface{}) {
    defer func() {
        if r := recover(); r != nil {
            var ok bool
            err, ok = r.(error)
            if !ok {
                debug.PrintStack()
            }
        }
    }()
    if filter.RegexFiler != nil {
        for k, v := range filter.RegexFiler {
            filter.Filter[k] = primitive.Regex{Pattern: v, Options: ""}
        }
    }
    collections := m.Client.Database(Conf.String("mongo::db")).Collection(collection)
    cur, err := collections.Find(m.Ctx, filter, &options.FindOptions{Limit: filter.Limit, Skip: filter.Skip, Sort: bson.M{filter.SortBy: filter.SortMode}})
    defer cur.Close(m.Ctx)
    if err == nil {
        for cur.Next(m.Ctx) {
            var e interface{}
            cur.Decode(&e)
        }
    }
    return
}

func (m *MongoClient) Delete(collection, id string) (error, bool) {
    var err error
    defer func() {
        if r := recover(); r != nil {
            var ok bool
            err, ok = r.(error)
            if !ok {
                debug.PrintStack()
            }
        }
    }()

    collections := m.Client.Database(Conf.String("mongo::db")).Collection(collection)
    objID, _ := primitive.ObjectIDFromHex(id)
    result, err := collections.DeleteOne(m.Ctx, bson.M{"_id": objID})
    return err, result.DeletedCount == 1
    // result, err := collections.DeleteMany(ctx, bson.M{"phone": primitive.Regex{Pattern: "456", Options: ""}})
}

func (m *MongoClient) Modify(collection string, e BaseEntity) (error, bool) {
    var err error
    defer func() {
        if r := recover(); r != nil {
            var ok bool
            err, ok = r.(error)
            if !ok {
                debug.PrintStack()
            }
        }
    }()
    collections := m.Client.Database(Conf.String("mongo::db")).Collection(collection)
    // collections.UpdateOne
    // collections.UpdateMany
    objID, _ := primitive.ObjectIDFromHex(e.GetId())
    result, err := collections.ReplaceOne(m.Ctx, bson.M{"_id": objID}, e)
    return err, result.ModifiedCount == 1
}

以一个简单的model为例,需要先实现BaseEntity接口,定义一个名为Test的model,如下:

type Test struct {
    Id         string
    Name         string
    Creator    string
    CreateAt   int64
}

func (e Test) GetId() string {
    return e.Id
}

func (e *Test) SetId(id string) {
    e.Id = id
}

调用上面定义好的client进行数据库操作,下面以创建一条记录为例:

var t Test
Mongo.Create("LicenseReview", &t)

本文来自:简书

感谢作者:四颗豆

查看原文:mongodb基于golang的官方driver

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