关于golang:带你十天轻松搞定-Go-微服务系列五

序言

咱们通过一个系列文章跟大家具体展现一个 go-zero 微服务示例，整个系列分十篇文章，目录构造如下：

1. 环境搭建
2. 服务拆分
3. 用户服务
4. 产品服务
5. 订单服务（本文）
6. 领取服务
7. RPC 服务 Auth 验证
8. 服务监控
9. 链路追踪
10. 分布式事务

冀望通过本系列带你在本机利用 Docker 环境利用 go-zero 疾速开发一个商城零碎，让你疾速上手微服务。

残缺示例代码：https://github.com/nivin-studio/go-zero-mall

首先，咱们来看一下整体的服务拆分图：

5 订单服务（order）

• 进入服务工作区

$ cd mall/service/order

5.1 生成 order model 模型

• 创立 sql 文件

$ vim model/order.sql

• 编写 sql 文件

CREATE TABLE `order` (
    `id` bigint unsigned NOT NULL AUTO_INCREMENT,
    `uid` bigint unsigned NOT NULL DEFAULT '0' COMMENT '用户 ID',
    `pid` bigint unsigned NOT NULL DEFAULT '0' COMMENT '产品 ID',
    `amount` int(10) unsigned NOT NULL DEFAULT '0'  COMMENT '订单金额',
    `status` tinyint(3) unsigned NOT NULL DEFAULT '0' COMMENT '订单状态',
    `create_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
    `update_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (`id`),
    KEY `idx_uid` (`uid`),
    KEY `idx_pid` (`pid`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8mb4;

• 运行模板生成命令

$ goctl model mysql ddl -src ./model/order.sql -dir ./model -c

5.2 生成 order api 服务

• 创立 api 文件

$ vim api/order.api

• 编写 api 文件

type (
    // 订单创立
    CreateRequest {
        Uid    int64 `json:"uid"`
        Pid    int64 `json:"pid"`
        Amount int64 `json:"amount"`
        Status int64 `json:"status"`
    }
    CreateResponse {Id int64 `json:"id"`}
    // 订单创立

    // 订单批改
    UpdateRequest {
        Id     int64 `json:"id"`
        Uid    int64 `json:"uid,optional"`
        Pid    int64 `json:"pid,optional"`
        Amount int64 `json:"amount,optional"`
        Status int64 `json:"status,optional"`
    }
    UpdateResponse { }
    // 订单批改

    // 订单删除
    RemoveRequest {Id int64 `json:"id"`}
    RemoveResponse { }
    // 订单删除

    // 订单详情
    DetailRequest {Id int64 `json:"id"`}
    DetailResponse {
        Id     int64 `json:"id"`
        Uid    int64 `json:"uid"`
        Pid    int64 `json:"pid"`
        Amount int64 `json:"amount"`
        Status int64 `json:"status"`
    }
    // 订单详情

    // 订单列表
    ListRequest {Uid int64 `json:"uid"`}
    ListResponse {
        Id     int64 `json:"id"`
        Uid    int64 `json:"uid"`
        Pid    int64 `json:"pid"`
        Amount int64 `json:"amount"`
        Status int64 `json:"status"`
    }
    // 订单列表
)

@server(jwt: Auth)
service Order {
    @handler Create
    post /api/order/create(CreateRequest) returns (CreateResponse)
    
    @handler Update
    post /api/order/update(UpdateRequest) returns (UpdateResponse)
    
    @handler Remove
    post /api/order/remove(RemoveRequest) returns (RemoveResponse)
    
    @handler Detail
    post /api/order/detail(DetailRequest) returns (DetailResponse)
    
    @handler List
    post /api/order/list(ListRequest) returns (ListResponse)
}

• 运行模板生成命令

$ goctl api go -api ./api/order.api -dir ./api

5.3 生成 order rpc 服务

• 创立 proto 文件

$ vim rpc/order.proto

• 编写 proto 文件

syntax = "proto3";

package orderclient;

option go_package = "order";

// 订单创立
message CreateRequest {
    int64 Uid = 1;
    int64 Pid = 2;
    int64 Amount = 3;
    int64 Status = 4;
}
message CreateResponse {int64 id = 1;}
// 订单创立

// 订单批改
message UpdateRequest {
    int64 id = 1;
    int64 Uid = 2;
    int64 Pid = 3;
    int64 Amount = 4;
    int64 Status = 5;
}
message UpdateResponse {
}
// 订单批改

// 订单删除
message RemoveRequest {int64 id = 1;}
message RemoveResponse {
}
// 订单删除

// 订单详情
message DetailRequest {int64 id = 1;}
message DetailResponse {
    int64 id = 1;
    int64 Uid = 2;
    int64 Pid = 3;
    int64 Amount = 4;
    int64 Status = 5;
}
// 订单详情

// 订单列表
message ListRequest {int64 uid = 1;}
message ListResponse {repeated DetailResponse data = 1;}
// 订单列表

// 订单领取
message PaidRequest {int64 id = 1;}
message PaidResponse {
}
// 订单领取

service Order {rpc Create(CreateRequest) returns(CreateResponse);
    rpc Update(UpdateRequest) returns(UpdateResponse);
    rpc Remove(RemoveRequest) returns(RemoveResponse);
    rpc Detail(DetailRequest) returns(DetailResponse);
    rpc List(ListRequest) returns(ListResponse);
    rpc Paid(PaidRequest) returns(PaidResponse);
}

• 运行模板生成命令

$ goctl rpc proto -src ./rpc/order.proto -dir ./rpc

5.4 编写 order rpc 服务

5.4.1 批改配置文件

• 批改 order.yaml 配置文件

$ vim rpc/etc/order.yaml

• 批改服务监听地址，端口号为 0.0.0.0:9002，Etcd 服务配置，Mysql 服务配置，CacheRedis 服务配置

Name: order.rpc
ListenOn: 0.0.0.0:9002

Etcd:
  Hosts:
  - etcd:2379
  Key: order.rpc

Mysql:
  DataSource: root:123456@tcp(mysql:3306)/mall?charset=utf8mb4&parseTime=true&loc=Asia%2FShanghai

CacheRedis:
- Host: redis:6379
  Type: node
  Pass:

5.4.2 增加 order model 依赖

• 增加 Mysql 服务配置，CacheRedis 服务配置的实例化

$ vim rpc/internal/config/config.go

package config

import (
    "github.com/tal-tech/go-zero/core/stores/cache"
    "github.com/tal-tech/go-zero/zrpc"
)

type Config struct {
    zrpc.RpcServerConf

    Mysql struct {DataSource string}
    
    CacheRedis cache.CacheConf
}

• 注册服务上下文 order model 的依赖

$ vim rpc/internal/svc/servicecontext.go

package svc

import (
    "mall/service/order/model"
    "mall/service/order/rpc/internal/config"

    "github.com/tal-tech/go-zero/core/stores/sqlx"
)

type ServiceContext struct {
    Config config.Config

    OrderModel model.OrderModel
}

func NewServiceContext(c config.Config) *ServiceContext {conn := sqlx.NewMysql(c.Mysql.DataSource)
    return &ServiceContext{
        Config:     c,
        OrderModel: model.NewOrderModel(conn, c.CacheRedis),
    }
}

5.4.3 增加 user rpc，product rpc 依赖

• 增加 user rpc, product rpc 服务配置

$ vim rpc/etc/order.yaml

Name: order.rpc
ListenOn: 0.0.0.0:9002
Etcd:
  Hosts:
  - etcd:2379
  Key: order.rpc
  
......

UserRpc:
  Etcd:
    Hosts:
    - etcd:2379
    Key: user.rpc

ProductRpc:
  Etcd:
    Hosts:
    - etcd:2379
    Key: product.rpc

• 增加 user rpc, product rpc 服务配置的实例化

$ vim rpc/internal/config/config.go

package config

import (
    "github.com/tal-tech/go-zero/core/stores/cache"
    "github.com/tal-tech/go-zero/zrpc"
)

type Config struct {
    zrpc.RpcServerConf

    Mysql struct {DataSource string}
    
    CacheRedis cache.CacheConf

    UserRpc    zrpc.RpcClientConf
    ProductRpc zrpc.RpcClientConf
}

• 注册服务上下文 user rpc, product rpc 的依赖

$ vim rpc/internal/svc/servicecontext.go

package svc

import (
    "mall/service/order/model"
    "mall/service/order/rpc/internal/config"
    "mall/service/product/rpc/productclient"
    "mall/service/user/rpc/userclient"

    "github.com/tal-tech/go-zero/core/stores/sqlx"
    "github.com/tal-tech/go-zero/zrpc"
)

type ServiceContext struct {
    Config config.Config

    OrderModel model.OrderModel

    UserRpc    userclient.User
    ProductRpc productclient.Product
}

func NewServiceContext(c config.Config) *ServiceContext {conn := sqlx.NewMysql(c.Mysql.DataSource)
    return &ServiceContext{
        Config:     c,
        OrderModel: model.NewOrderModel(conn, c.CacheRedis),
        UserRpc:    userclient.NewUser(zrpc.MustNewClient(c.UserRpc)),
        ProductRpc: productclient.NewProduct(zrpc.MustNewClient(c.ProductRpc)),
    }
}

5.4.4 增加订单创立逻辑 Create

订单创立流程，通过调用 user rpc 服务查问验证用户是否存在，再通过调用 product rpc 服务查问验证产品是否存在，以及判断产品库存是否短缺。验证通过后，创立用户订单，并通过调用 product rpc 服务更新产品库存。

$ vim rpc/internal/logic/createlogic.go

package logic

import (
    "context"

    "mall/service/order/model"
    "mall/service/order/rpc/internal/svc"
    "mall/service/order/rpc/order"
    "mall/service/product/rpc/product"
    "mall/service/user/rpc/user"

    "github.com/tal-tech/go-zero/core/logx"
    "google.golang.org/grpc/status"
)

type CreateLogic struct {
    ctx    context.Context
    svcCtx *svc.ServiceContext
    logx.Logger
}

func NewCreateLogic(ctx context.Context, svcCtx *svc.ServiceContext) *CreateLogic {
    return &CreateLogic{
        ctx:    ctx,
        svcCtx: svcCtx,
        Logger: logx.WithContext(ctx),
    }
}

func (l *CreateLogic) Create(in *order.CreateRequest) (*order.CreateResponse, error) {
    // 查问用户是否存在
    _, err := l.svcCtx.UserRpc.UserInfo(l.ctx, &user.UserInfoRequest{Id: in.Uid,})
    if err != nil {return nil, err}

    // 查问产品是否存在
    productRes, err := l.svcCtx.ProductRpc.Detail(l.ctx, &product.DetailRequest{Id: in.Pid,})
    if err != nil {return nil, err}
    // 判断产品库存是否短缺
    if productRes.Stock <= 0 {return nil, status.Error(500, "产品库存有余")
    }

    newOrder := model.Order{
        Uid:    in.Uid,
        Pid:    in.Pid,
        Amount: in.Amount,
        Status: 0,
    }
        // 创立订单
    res, err := l.svcCtx.OrderModel.Insert(&newOrder)
    if err != nil {return nil, status.Error(500, err.Error())
    }

    newOrder.Id, err = res.LastInsertId()
    if err != nil {return nil, status.Error(500, err.Error())
    }
        // 更新产品库存
    _, err = l.svcCtx.ProductRpc.Update(l.ctx, &product.UpdateRequest{
        Id:     productRes.Id,
        Name:   productRes.Name,
        Desc:   productRes.Desc,
                Stock:  productRes.Stock - 1,
        Amount: productRes.Amount,
        Status: productRes.Status,
    })
    if err != nil {return nil, err}

    return &order.CreateResponse{Id: newOrder.Id,}, nil
}

! 留神：这里的产品库存更新存在数据一致性问题，在以往的我的项目中咱们会应用数据库的事务进行这一系列的操作来保证数据的一致性。然而因为咱们这边把“订单”和“产品”分成了不同的微服务，在理论的我的项目中他们可能领有不同的数据库，所以咱们要思考在跨服务的状况下还能保证数据的一致性，这就波及到了分布式事务的应用，在前面的章节中咱们将介绍应用分布式事务来批改这个下单的逻辑。

5.4.5 增加订单详情逻辑 Detail

$ vim rpc/internal/logic/detaillogic.go

package logic

import (
    "context"

    "mall/service/order/model"
    "mall/service/order/rpc/internal/svc"
    "mall/service/order/rpc/order"

    "github.com/tal-tech/go-zero/core/logx"
    "google.golang.org/grpc/status"
)

type DetailLogic struct {
    ctx    context.Context
    svcCtx *svc.ServiceContext
    logx.Logger
}

func NewDetailLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DetailLogic {
    return &DetailLogic{
        ctx:    ctx,
        svcCtx: svcCtx,
        Logger: logx.WithContext(ctx),
    }
}

func (l *DetailLogic) Detail(in *order.DetailRequest) (*order.DetailResponse, error) {
    // 查问订单是否存在
    res, err := l.svcCtx.OrderModel.FindOne(in.Id)
    if err != nil {
        if err == model.ErrNotFound {return nil, status.Error(100, "订单不存在")
        }
        return nil, status.Error(500, err.Error())
    }

    return &order.DetailResponse{
        Id:     res.Id,
        Uid:    res.Uid,
        Pid:    res.Pid,
        Amount: res.Amount,
        Status: res.Status,
    }, nil
}

5.4.6 增加订单更新逻辑 Update

$ vim rpc/internal/logic/updatelogic.go

package logic

import (
    "context"

    "mall/service/order/model"
    "mall/service/order/rpc/internal/svc"
    "mall/service/order/rpc/order"

    "github.com/tal-tech/go-zero/core/logx"
    "google.golang.org/grpc/status"
)

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 *order.UpdateRequest) (*order.UpdateResponse, error) {
    // 查问订单是否存在
    res, err := l.svcCtx.OrderModel.FindOne(in.Id)
    if err != nil {
        if err == model.ErrNotFound {return nil, status.Error(100, "订单不存在")
        }
        return nil, status.Error(500, err.Error())
    }

    if in.Uid != 0 {res.Uid = in.Uid}
    if in.Pid != 0 {res.Pid = in.Pid}
    if in.Amount != 0 {res.Amount = in.Amount}
    if in.Status != 0 {res.Status = in.Status}

    err = l.svcCtx.OrderModel.Update(res)
    if err != nil {return nil, status.Error(500, err.Error())
    }

    return &order.UpdateResponse{}, nil}

5.4.7 增加订单删除逻辑 Remove

$ vim rpc/internal/logic/removelogic.go

package logic

import (
    "context"

    "mall/service/order/model"
    "mall/service/order/rpc/internal/svc"
    "mall/service/order/rpc/order"

    "github.com/tal-tech/go-zero/core/logx"
    "google.golang.org/grpc/status"
)

type RemoveLogic struct {
    ctx    context.Context
    svcCtx *svc.ServiceContext
    logx.Logger
}

func NewRemoveLogic(ctx context.Context, svcCtx *svc.ServiceContext) *RemoveLogic {
    return &RemoveLogic{
        ctx:    ctx,
        svcCtx: svcCtx,
        Logger: logx.WithContext(ctx),
    }
}

func (l *RemoveLogic) Remove(in *order.RemoveRequest) (*order.RemoveResponse, error) {
    // 查问订单是否存在
    res, err := l.svcCtx.OrderModel.FindOne(in.Id)
    if err != nil {
        if err == model.ErrNotFound {return nil, status.Error(100, "订单不存在")
        }
        return nil, status.Error(500, err.Error())
    }

    err = l.svcCtx.OrderModel.Delete(res.Id)
    if err != nil {return nil, status.Error(500, err.Error())
    }

    return &order.RemoveResponse{}, nil}

5.4.8 增加订单列表逻辑 List

• 增加依据 uid 查问用户所有订单的 OrderModel 办法 FindAllByUid

$ vim model/ordermodel.go

package model

......

type (
    OrderModel interface {Insert(data *Order) (sql.Result, error)
        FindOne(id int64) (*Order, error)
        FindAllByUid(uid int64) ([]*Order, error)
        Update(data *Order) error
        Delete(id int64) error
    }

    ......
)

......

func (m *defaultOrderModel) FindAllByUid(uid int64) ([]*Order, error) {var resp []*Order

    query := fmt.Sprintf("select %s from %s where `uid` = ?", orderRows, m.table)
    err := m.QueryRowsNoCache(&resp, query, uid)

    switch err {
    case nil:
        return resp, nil
    case sqlc.ErrNotFound:
        return nil, ErrNotFound
    default:
        return nil, err
    }
}

......

• 增加订单列表逻辑

$ vim rpc/internal/logic/listlogic.go

package logic

import (
    "context"

    "mall/service/order/model"
    "mall/service/order/rpc/internal/svc"
    "mall/service/order/rpc/order"
    "mall/service/user/rpc/user"

    "github.com/tal-tech/go-zero/core/logx"
    "google.golang.org/grpc/status"
)

type ListLogic struct {
    ctx    context.Context
    svcCtx *svc.ServiceContext
    logx.Logger
}

func NewListLogic(ctx context.Context, svcCtx *svc.ServiceContext) *ListLogic {
    return &ListLogic{
        ctx:    ctx,
        svcCtx: svcCtx,
        Logger: logx.WithContext(ctx),
    }
}

func (l *ListLogic) List(in *order.ListRequest) (*order.ListResponse, error) {
    // 查问用户是否存在
    _, err := l.svcCtx.UserRpc.UserInfo(l.ctx, &user.UserInfoRequest{Id: in.Uid,})
    if err != nil {return nil, err}

    // 查问订单是否存在
    list, err := l.svcCtx.OrderModel.FindAllByUid(in.Uid)
    if err != nil {
        if err == model.ErrNotFound {return nil, status.Error(100, "订单不存在")
        }
        return nil, status.Error(500, err.Error())
    }

    orderList := make([]*order.DetailResponse, 0)
    for _, item := range list {
        orderList = append(orderList, &order.DetailResponse{
            Id:     item.Id,
            Uid:    item.Uid,
            Pid:    item.Pid,
            Amount: item.Amount,
            Status: item.Status,
        })
    }

    return &order.ListResponse{Data: orderList,}, nil
}

5.4.9 增加订单领取逻辑 Paid

$ vim rpc/internal/logic/paidlogic.go

package logic

import (
    "context"

    "mall/service/order/model"
    "mall/service/order/rpc/internal/svc"
    "mall/service/order/rpc/order"

    "github.com/tal-tech/go-zero/core/logx"
    "google.golang.org/grpc/status"
)

type PaidLogic struct {
    ctx    context.Context
    svcCtx *svc.ServiceContext
    logx.Logger
}

func NewPaidLogic(ctx context.Context, svcCtx *svc.ServiceContext) *PaidLogic {
    return &PaidLogic{
        ctx:    ctx,
        svcCtx: svcCtx,
        Logger: logx.WithContext(ctx),
    }
}

func (l *PaidLogic) Paid(in *order.PaidRequest) (*order.PaidResponse, error) {
    // 查问订单是否存在
    res, err := l.svcCtx.OrderModel.FindOne(in.Id)
    if err != nil {
        if err == model.ErrNotFound {return nil, status.Error(100, "订单不存在")
        }
        return nil, status.Error(500, err.Error())
    }

    res.Status = 1

    err = l.svcCtx.OrderModel.Update(res)
    if err != nil {return nil, status.Error(500, err.Error())
    }

    return &order.PaidResponse{}, nil}

5.5 编写 order api 服务

5.5.1 批改配置文件

• 批改 order.yaml 配置文件

$ vim api/etc/order.yaml

• 批改服务地址，端口号为 0.0.0.0:8002，Mysql 服务配置，CacheRedis 服务配置，Auth 验证配置

Name: Order
Host: 0.0.0.0
Port: 8002

Mysql:
  DataSource: root:123456@tcp(mysql:3306)/mall?charset=utf8mb4&parseTime=true&loc=Asia%2FShanghai

CacheRedis:
- Host: redis:6379
  Type: node
  Pass:

Auth:
  AccessSecret: uOvKLmVfztaXGpNYd4Z0I1SiT7MweJhl
  AccessExpire: 86400

5.5.2 增加 order rpc 依赖

• 增加 order rpc 服务配置

$ vim api/etc/order.yaml

Name: Order
Host: 0.0.0.0
Port: 8002

......

OrderRpc:
  Etcd:
    Hosts:
    - etcd:2379
    Key: order.rpc

• 增加 order rpc 服务配置的实例化

$ vim api/internal/config/config.go

package config

import (
    "github.com/tal-tech/go-zero/rest"
    "github.com/tal-tech/go-zero/zrpc"
)

type Config struct {
    rest.RestConf

    Auth struct {
        AccessSecret string
        AccessExpire int64
    }

    OrderRpc zrpc.RpcClientConf
}

• 注册服务上下文 user rpc 的依赖

$ vim api/internal/svc/servicecontext.go

package svc

import (
    "mall/service/order/api/internal/config"
    "mall/service/order/rpc/orderclient"

    "github.com/tal-tech/go-zero/zrpc"
)

type ServiceContext struct {
    Config config.Config

    OrderRpc orderclient.Order
}

func NewServiceContext(c config.Config) *ServiceContext {
    return &ServiceContext{
        Config:   c,
        OrderRpc: orderclient.NewOrder(zrpc.MustNewClient(c.OrderRpc)),
    }
}

5.5.3 增加订单创立逻辑 Create

$ vim api/internal/logic/createlogic.go

package logic

import (
    "context"

    "mall/service/order/api/internal/svc"
    "mall/service/order/api/internal/types"
    "mall/service/order/rpc/orderclient"

    "github.com/tal-tech/go-zero/core/logx"
)

type CreateLogic struct {
    logx.Logger
    ctx    context.Context
    svcCtx *svc.ServiceContext
}

func NewCreateLogic(ctx context.Context, svcCtx *svc.ServiceContext) CreateLogic {
    return CreateLogic{Logger: logx.WithContext(ctx),
        ctx:    ctx,
        svcCtx: svcCtx,
    }
}

func (l *CreateLogic) Create(req types.CreateRequest) (resp *types.CreateResponse, err error) {
    res, err := l.svcCtx.OrderRpc.Create(l.ctx, &orderclient.CreateRequest{
        Uid:    req.Uid,
        Pid:    req.Pid,
        Amount: req.Amount,
        Status: req.Status,
    })
    if err != nil {return nil, err}

    return &types.CreateResponse{Id: res.Id,}, nil
}

5.5.4 增加订单详情逻辑 Detail

$ vim api/internal/logic/detaillogic.go

package logic

import (
    "context"

    "mall/service/order/api/internal/svc"
    "mall/service/order/api/internal/types"
    "mall/service/order/rpc/orderclient"

    "github.com/tal-tech/go-zero/core/logx"
)

type DetailLogic struct {
    logx.Logger
    ctx    context.Context
    svcCtx *svc.ServiceContext
}

func NewDetailLogic(ctx context.Context, svcCtx *svc.ServiceContext) DetailLogic {
    return DetailLogic{Logger: logx.WithContext(ctx),
        ctx:    ctx,
        svcCtx: svcCtx,
    }
}

func (l *DetailLogic) Detail(req types.DetailRequest) (resp *types.DetailResponse, err error) {
    res, err := l.svcCtx.OrderRpc.Detail(l.ctx, &orderclient.DetailRequest{Id: req.Id,})
    if err != nil {return nil, err}

    return &types.DetailResponse{
        Id:     res.Id,
        Uid:    res.Uid,
        Pid:    res.Pid,
        Amount: res.Amount,
        Status: res.Status,
    }, nil
}

5.5.5 增加订单更新逻辑 Update

$ vim api/internal/logic/updatelogic.go

package logic

import (
    "context"

    "mall/service/order/api/internal/svc"
    "mall/service/order/api/internal/types"
    "mall/service/order/rpc/orderclient"

    "github.com/tal-tech/go-zero/core/logx"
)

type UpdateLogic struct {
    logx.Logger
    ctx    context.Context
    svcCtx *svc.ServiceContext
}

func NewUpdateLogic(ctx context.Context, svcCtx *svc.ServiceContext) UpdateLogic {
    return UpdateLogic{Logger: logx.WithContext(ctx),
        ctx:    ctx,
        svcCtx: svcCtx,
    }
}

func (l *UpdateLogic) Update(req types.UpdateRequest) (resp *types.UpdateResponse, err error) {
    _, err = l.svcCtx.OrderRpc.Update(l.ctx, &orderclient.UpdateRequest{
        Id:     req.Id,
        Uid:    req.Uid,
        Pid:    req.Pid,
        Amount: req.Amount,
        Status: req.Status,
    })
    if err != nil {return nil, err}

    return &types.UpdateResponse{}, nil}

5.5.6 增加订单删除逻辑 Remove

$ vim api/internal/logic/removelogic.go

package logic

import (
    "context"

    "mall/service/order/api/internal/svc"
    "mall/service/order/api/internal/types"
    "mall/service/order/rpc/orderclient"

    "github.com/tal-tech/go-zero/core/logx"
)

type RemoveLogic struct {
    logx.Logger
    ctx    context.Context
    svcCtx *svc.ServiceContext
}

func NewRemoveLogic(ctx context.Context, svcCtx *svc.ServiceContext) RemoveLogic {
    return RemoveLogic{Logger: logx.WithContext(ctx),
        ctx:    ctx,
        svcCtx: svcCtx,
    }
}

func (l *RemoveLogic) Remove(req types.RemoveRequest) (resp *types.RemoveResponse, err error) {
    _, err = l.svcCtx.OrderRpc.Remove(l.ctx, &orderclient.RemoveRequest{Id: req.Id,})
    if err != nil {return nil, err}

    return &types.RemoveResponse{}, nil}

5.5.7 增加订单列表逻辑 List

$ vim api/internal/logic/listlogic.go

package logic

import (
    "context"

    "mall/service/order/api/internal/svc"
    "mall/service/order/api/internal/types"
    "mall/service/order/rpc/orderclient"

    "github.com/tal-tech/go-zero/core/logx"
)

type ListLogic struct {
    logx.Logger
    ctx    context.Context
    svcCtx *svc.ServiceContext
}

func NewListLogic(ctx context.Context, svcCtx *svc.ServiceContext) ListLogic {
    return ListLogic{Logger: logx.WithContext(ctx),
        ctx:    ctx,
        svcCtx: svcCtx,
    }
}

func (l *ListLogic) List(req types.ListRequest) (resp []*types.ListResponse, err error) {
    res, err := l.svcCtx.OrderRpc.List(l.ctx, &orderclient.ListRequest{Uid: req.Uid,})
    if err != nil {return nil, err}

    orderList := make([]*types.ListResponse, 0)
    for _, item := range res.Data {
        orderList = append(orderList, &types.ListResponse{
            Id:     item.Id,
            Uid:    item.Uid,
            Pid:    item.Pid,
            Amount: item.Amount,
            Status: item.Status,
        })
    }

    return orderList, nil
}

5.6 启动 order rpc 服务

! 提醒：启动服务须要在 golang 容器中启动

$ cd mall/service/order/rpc
$ go run order.go -f etc/order.yaml
Starting rpc server at 127.0.0.1:9002...

5.7 启动 order api 服务

! 提醒：启动服务须要在 golang 容器中启动

$ cd mall/service/order/api
$ go run order.go -f etc/order.yaml
Starting server at 0.0.0.0:8002...

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https://github.com/zeromicro/go-zero

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