转载自：go-zero docker-compose 搭建课件服务（二）：编写courseware rpc服务
1、创立model
mysql中创立数据库
create database go_zero_courseware default character set utf8mb4 collate utf8mb4_unicode_ci;创立sql文件
touch courseware/rpc/model/courseware.sqlCREATE TABLE `courseware`( `id` bigint unsigned NOT NULL AUTO_INCREMENT, `code` varchar(255) NOT NULL DEFAULT '' COMMENT '编号', `name` varchar(255) NOT NULL DEFAULT '' COMMENT '用户姓名', `type` tinyint(3) unsigned NOT NULL DEFAULT '0' COMMENT '课件类型 1-h5 2-scorm 3-多媒体多章节', `is_delete` tinyint(4) NOT NULL DEFAULT 0 COMMENT '是否删除 0-未删除 1-已删除', `create_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP, `update_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`), UNIQUE KEY `idx_mobile_unique` (`mobile`)) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;生成model
# 到对应model目录下cd courseware/rpc/model# 生成modelgoctl model mysql ddl -src="./*.sql" -dir="./" -c2、生成rpc文件
须要提前装置了protoc & protoc-gen-go，自行搜寻装置
# 回到courseware rpc目录 ./go-zero-courseware/courseware/rpccd ../goctl rpc protoc courseware.proto --go_out=. --go-grpc_out=. --zrpc_out=.3、初始化module
# 门路 coursewarego mod initgo mod tidy4、增加数据库源
courseware.yaml中减少mysql配置
# 门路# go-zero-courseware/courseware/rpc/etc/courseware.yamlName: courseware.rpcListenOn: 0.0.0.0:9400Etcd: Hosts: - etcd:2379 Key: courseware.rpc# mysql数据源Mysql: DataSource: root:liufutian@tcp(192.168.0.110:3306)/go_zero_courseware?charset=utf8mb4&parseTime=true&loc=Asia%2FShanghai# redis缓存CacheRedis: - Host: 192.168.0.110:6379 Pass:config.go文件中减少mysql配置项
// 门路 courseware/rpc/internal/config/config.gopackage configimport ( "github.com/zeromicro/go-zero/core/stores/cache" "github.com/zeromicro/go-zero/zrpc")type Config struct { zrpc.RpcServerConf Mysql struct { DataSource string } CacheRedis cache.CacheConf}servicecontext.go中减少CoursewareModel配置
// 门路 courseware/rpc/internal/svc/servicecontext.gopackage svcimport ( "github.com/zeromicro/go-zero/core/stores/sqlx" "go-zero-courseware/courseware/rpc/internal/config" "go-zero-courseware/courseware/rpc/model")type ServiceContext struct { Config config.Config CoursewareModel model.CoursewareModel}func NewServiceContext(c config.Config) *ServiceContext { conn := sqlx.NewMysql(c.Mysql.DataSource) return &ServiceContext{ Config: c, CoursewareModel: model.NewCoursewareModel(conn, c.CacheRedis), }}5、编写增删改查逻辑
courseware/rpc/internal/logic/addlogic.go批改如下
package logicimport ( "context" "go-zero-courseware/courseware/rpc/courseware" "go-zero-courseware/courseware/rpc/internal/svc" "go-zero-courseware/courseware/rpc/model" "google.golang.org/grpc/status" "github.com/zeromicro/go-zero/core/logx")type AddLogic struct { ctx context.Context svcCtx *svc.ServiceContext logx.Logger}func NewAddLogic(ctx context.Context, svcCtx *svc.ServiceContext) *AddLogic { return &AddLogic{ ctx: ctx, svcCtx: svcCtx, Logger: logx.WithContext(ctx), }}func (l *AddLogic) Add(in *courseware.AddRequest) (*courseware.AddResponse, error) { _, err := l.svcCtx.CoursewareModel.FindOneByCode(l.ctx, in.Code) if err == nil { return nil, status.Error(5000, "课件已存在") } if err == model.ErrNotFound { newCourseware := model.Courseware{ Code: in.Code, Name: in.Name, Type: in.Type, } _, err = l.svcCtx.CoursewareModel.Insert(l.ctx, &newCourseware) if err != nil { return nil, status.Error(500, err.Error()) } return &courseware.AddResponse{}, nil } return nil, status.Error(500, err.Error())}courseware/rpc/internal/logic/deletelogic.go批改如下
package logicimport ( "context" "google.golang.org/grpc/status" "go-zero-courseware/courseware/rpc/courseware" "go-zero-courseware/courseware/rpc/internal/svc" "github.com/zeromicro/go-zero/core/logx")type DeleteLogic struct { ctx context.Context svcCtx *svc.ServiceContext logx.Logger}func NewDeleteLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DeleteLogic { return &DeleteLogic{ ctx: ctx, svcCtx: svcCtx, Logger: logx.WithContext(ctx), }}func (l *DeleteLogic) Delete(in *courseware.DeleteRequest) (*courseware.DeleteResponse, error) { err := l.svcCtx.CoursewareModel.Delete(l.ctx, in.Id) if err != nil { return nil, status.Error(500, err.Error()) } return &courseware.DeleteResponse{}, nil}courseware/rpc/internal/logic/getlogic.go批改如下
package logicimport ( "context" "google.golang.org/grpc/status" "go-zero-courseware/courseware/rpc/courseware" "go-zero-courseware/courseware/rpc/internal/svc" "github.com/zeromicro/go-zero/core/logx")type GetLogic struct { ctx context.Context svcCtx *svc.ServiceContext logx.Logger}func NewGetLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetLogic { return &GetLogic{ ctx: ctx, svcCtx: svcCtx, Logger: logx.WithContext(ctx), }}func (l *GetLogic) Get(in *courseware.GetRequest) (*courseware.GetResponse, error) { cw, err := l.svcCtx.CoursewareModel.FindOne(l.ctx, in.Id) if err != nil { return nil, status.Error(5000, "课件不存在") } return &courseware.GetResponse{ Id: cw.Id, Code: cw.Code, Name: cw.Name, Type: cw.Type, }, nil}courseware/rpc/internal/logic/updatelogic.go批改如下：
package logicimport ( "context" "google.golang.org/grpc/status" "go-zero-courseware/courseware/rpc/courseware" "go-zero-courseware/courseware/rpc/internal/svc" "github.com/zeromicro/go-zero/core/logx")type UpdateLogic struct { ctx context.Context svcCtx *svc.ServiceContext logx.Logger}func NewUpdateLogic(ctx context.Context, svcCtx *svc.ServiceContext) *UpdateLogic { return &UpdateLogic{ ctx: ctx, svcCtx: svcCtx, Logger: logx.WithContext(ctx), }}func (l *UpdateLogic) Update(in *courseware.UpdateRequest) (*courseware.UpdateResponse, error) { cw, err := l.svcCtx.CoursewareModel.FindOne(l.ctx, in.Id) if err != nil { return nil, status.Error(5000, "课件不存在") } _, err = l.svcCtx.CoursewareModel.FindOneByCode(l.ctx, in.Code) if err == nil { return nil, status.Error(5000, "课件编号已存在") } if in.Code != "" { cw.Code = in.Code } if in.Name != "" { cw.Name = in.Name } if in.Type > 0 { cw.Type = in.Type } err = l.svcCtx.CoursewareModel.Update(l.ctx, cw) if err != nil { return nil, status.Error(500, err.Error()) } return &courseware.UpdateResponse{}, nil}