第一步：安装

go install gorm.io/gen/tools/gentool@latest

第二步：运行

样例1通过配置文件：

gentool -c "hack/gen.yml"

样例2通过 字段获取

gentool -dsn "user:pwd@tcp(127.0.0.1:3306)/database?charset=utf8mb4&parseTime=True&loc=Local" -tables "kk_product"

gen.yml文件内容

version: "0.1"
database:
  # consult[https://gorm.io/docs/connecting_to_the_database.html]"
  dsn : "root:root@tcp(127.0.0.1:3306)/gotest?charset=utf8&parseTime=True&loc=Local"
  # input mysql or postgres or sqlite or sqlserver. consult[https://gorm.io/docs/connecting_to_the_database.html]
  db  : "mysql"
  # enter the required data table or leave it blank.You can input :
  tables  :
#     - kk_product
  # tables  :
  # specify a directory for output
  outPath :  "app/dao/query"
  # query code file name, default: gen.go
  outFile :  ""
  # generate unit test for query code
  withUnitTest  : false
  # generated model code's package name
  modelPkgName  : "app/model/internal"
  # generate with pointer when field is nullable
  fieldNullable : false
  # generate field with gorm index tag
  fieldWithIndexTag : false
  # generate field with gorm column type tag
  fieldWithTypeTag  : false
  # detect integer field's unsigned type, adjust generated data type
  fieldSignable  : false

备注：

gentool -h  
 
 Usage of gentool:
  -c string 是gen.yml的路径
        is path for gen.yml
  -db string 输入mysql或postgres或sqlite或sqlserver 数据库类型
        input mysql or postgres or sqlite or sqlserver. consult[https://gorm.io/docs/connecting_to_the_database.html] (default "mysql")
  -dsn string  数据库配置信息
        consult[https://gorm.io/docs/connecting_to_the_database.html]
  -fieldNullable 生成的模型代码的包名 当字段为空时使用指针生成
        generate with pointer when field is nullable
  -fieldSignable 要检测整型字段的无符号类型，请调整生成的数据类型
        detect integer field's unsigned type, adjust generated data type
  -fieldWithIndexTag 使用gorm索引标记生成字段
        generate field with gorm index tag
  -fieldWithTypeTag 使用gorm列类型标记生成字段
        generate field with gorm column type tag
  -modelPkgName string 表结构生成的对应目录
        generated model code's package name
  -onlyModel  仅生成模型（无查询文件）
        only generate models (without query file)
  -outFile string 查询代码文件名，默认值：gen.go      outPath底下的基础文件 建议用默认的gen.go
        query code file name, default: gen.go
  -outPath string 指定输出目录
        specify a directory for output (default "./dao/query")
  -tables string  输入所需的数据表或将其留空
        enter the required data table or leave it blank
  -withUnitTest 为查询代码生成单元测试
        generate unit test for query code

问题：

goland 报错，提示 cgo: C compiler "gcc" not found: exec: "gcc": executable file not found in %PATH%

1.缺乏编译软件导致的，软件下载地址

https://sourceforge.net/projects/mingw-w64/files/

2.下载之后，进行离线软件包安装

2.1 将下载文件解压在想要安装的地方即可

2.2 系统环境变量添加MinGW64 bin路径

2.3 测试在cmd命令里面输入 

gcc -v