/
main.go
297 lines (258 loc) · 8.17 KB
/
main.go
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package main
import (
"database/sql"
"flag"
"fmt"
"log"
"os"
"strings"
"github.com/eric-strive/gen-tool/cmd/mysqlmd/mysql"
"github.com/eric-strive/gen-tool/config"
"gorm.io/gorm"
)
type tableInfo struct {
Name string `db:"table_name"` // name
Comment sql.NullString `db:"table_comment"` // comment
}
type tableColumn struct {
OrdinalPosition uint16 `db:"ORDINAL_POSITION"` // position
ColumnName string `db:"COLUMN_NAME"` // name
ColumnType string `db:"COLUMN_TYPE"` // column_type
DataType string `db:"DATA_TYPE"` // data_type
ColumnKey sql.NullString `db:"COLUMN_KEY"` // key
IsNullable string `db:"IS_NULLABLE"` // nullable
Extra sql.NullString `db:"EXTRA"` // extra
ColumnComment sql.NullString `db:"COLUMN_COMMENT"` // comment
ColumnDefault sql.NullString `db:"COLUMN_DEFAULT"` // default value
}
var (
dbAddr string
dbUser string
dbPass string
dbName string
genTables string
)
func init() {
addr := flag.String("addr", "", "请输入 db 地址,例如:127.0.0.1:3306\n")
user := flag.String("user", "", "请输入 db 用户名\n")
pass := flag.String("pass", "", "请输入 db 密码\n")
name := flag.String("name", "", "请输入 db 名称\n")
table := flag.String("tables", "*", "请输入 table 名称,默认为“*”,多个可用“,”分割\n")
flag.Parse()
dbAddr = *addr
dbUser = *user
dbPass = *pass
dbName = strings.ToLower(*name)
genTables = strings.ToLower(*table)
}
func main() {
// 初始化 DB
db, err := mysql.New(dbAddr, dbUser, dbPass, dbName)
if err != nil {
log.Fatal("new db err", err)
}
defer func() {
if err := db.DbClose(); err != nil {
log.Println("db close err", err)
}
}()
tables, err := queryTables(db.GetDb(), dbName, genTables)
if err != nil {
log.Println("query tables of database err", err)
return
}
for _, table := range tables {
filepath := config.GenGormPath + "/" + table.Name
_ = os.Mkdir(filepath, 0766)
fmt.Println("create dir : ", filepath)
mdName := fmt.Sprintf("%s/gen_table.md", filepath)
mdFile, err := os.OpenFile(mdName, os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0766)
if err != nil {
fmt.Printf("markdown file error %v\n", err.Error())
return
}
fmt.Println(" └── file : ", table.Name+"/gen_table.md")
modelName := fmt.Sprintf("%s/gen_model.go", filepath)
modelFile, err := os.OpenFile(modelName, os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0766)
if err != nil {
fmt.Printf("create and open model file error %v\n", err.Error())
return
}
fmt.Println(" └── file : ", table.Name+"/gen_model.go")
modelContent := fmt.Sprintf("package %s\n", table.Name)
modelContent += fmt.Sprintf(`import "time"`)
modelContent += fmt.Sprintf("\n\n// %s %s \n", capitalize(table.Name), table.Comment.String)
modelContent += fmt.Sprintf("//go:generate gormgen -structs %s -input . \n", capitalize(table.Name))
modelContent += fmt.Sprintf("type %s struct {\n", capitalize(table.Name))
tableContent := fmt.Sprintf("#### %s.%s \n", dbName, table.Name)
if table.Comment.String != "" {
tableContent += table.Comment.String + "\n"
}
tableContent += "\n" +
"| 序号 | 名称 | 描述 | 类型 | 键 | 为空 | 额外 | 默认值 |\n" +
"| ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- |\n"
columnInfo, columnInfoErr := queryTableColumn(db.GetDb(), dbName, table.Name)
if columnInfoErr != nil {
continue
}
for _, info := range columnInfo {
tableContent += fmt.Sprintf(
"| %d | %s | %s | %s | %s | %s | %s | %s |\n",
info.OrdinalPosition,
info.ColumnName,
strings.ReplaceAll(strings.ReplaceAll(info.ColumnComment.String, "|", "\\|"), "\n", ""),
info.ColumnType,
info.ColumnKey.String,
info.IsNullable,
info.Extra.String,
info.ColumnDefault.String,
)
if textType(info.DataType) == "time.Time" {
modelContent += fmt.Sprintf("%s %s `%s %s` // %s\n", capitalize(info.ColumnName), textType(info.DataType), "gorm:\""+info.ColumnName+"\"", "gorm:\"time\"", info.ColumnComment.String)
} else {
modelContent += fmt.Sprintf("%s %s `%s`// %s\n", capitalize(info.ColumnName), textType(info.DataType), "gorm:\""+info.ColumnName+"\"", info.ColumnComment.String)
}
}
mdFile.WriteString(tableContent)
mdFile.Close()
modelContent += "}\n"
modelFile.WriteString(modelContent)
modelFile.Close()
}
}
func queryTables(db *gorm.DB, dbName string, tableName string) ([]tableInfo, error) {
var tableCollect []tableInfo
var tableArray []string
var commentArray []sql.NullString
sqlTables := fmt.Sprintf("SELECT `table_name`,`table_comment` FROM `information_schema`.`tables` WHERE `table_schema`= '%s'", dbName)
rows, err := db.Raw(sqlTables).Rows()
if err != nil {
return tableCollect, err
}
defer rows.Close()
for rows.Next() {
var info tableInfo
err = rows.Scan(&info.Name, &info.Comment)
if err != nil {
fmt.Printf("execute query tables action error,had ignored, detail is [%v]\n", err.Error())
continue
}
tableCollect = append(tableCollect, info)
tableArray = append(tableArray, info.Name)
commentArray = append(commentArray, info.Comment)
}
// filter tables when specified tables params
if tableName != "*" {
tableCollect = nil
chooseTables := strings.Split(tableName, ",")
indexMap := make(map[int]int)
for _, item := range chooseTables {
subIndexMap := getTargetIndexMap(tableArray, item)
for k, v := range subIndexMap {
if _, ok := indexMap[k]; ok {
continue
}
indexMap[k] = v
}
}
if len(indexMap) != 0 {
for _, v := range indexMap {
var info tableInfo
info.Name = tableArray[v]
info.Comment = commentArray[v]
tableCollect = append(tableCollect, info)
}
}
}
return tableCollect, err
}
func queryTableColumn(db *gorm.DB, dbName string, tableName string) ([]tableColumn, error) {
// 定义承载列信息的切片
var columns []tableColumn
sqlTableColumn := fmt.Sprintf("SELECT `ORDINAL_POSITION`,`COLUMN_NAME`,`COLUMN_TYPE`,`DATA_TYPE`,`COLUMN_KEY`,`IS_NULLABLE`,`EXTRA`,`COLUMN_COMMENT`,`COLUMN_DEFAULT` FROM `information_schema`.`columns` WHERE `table_schema`= '%s' AND `table_name`= '%s' ORDER BY `ORDINAL_POSITION` ASC",
dbName, tableName)
rows, err := db.Raw(sqlTableColumn).Rows()
if err != nil {
fmt.Printf("execute query table column action error, detail is [%v]\n", err.Error())
return columns, err
}
defer rows.Close()
for rows.Next() {
var column tableColumn
err = rows.Scan(
&column.OrdinalPosition,
&column.ColumnName,
&column.ColumnType,
&column.DataType,
&column.ColumnKey,
&column.IsNullable,
&column.Extra,
&column.ColumnComment,
&column.ColumnDefault)
if err != nil {
fmt.Printf("query table column scan error, detail is [%v]\n", err.Error())
return columns, err
}
columns = append(columns, column)
}
return columns, err
}
func getTargetIndexMap(tableNameArr []string, item string) map[int]int {
indexMap := make(map[int]int)
for i := 0; i < len(tableNameArr); i++ {
if tableNameArr[i] == item {
if _, ok := indexMap[i]; ok {
continue
}
indexMap[i] = i
}
}
return indexMap
}
func capitalize(s string) string {
var upperStr string
chars := strings.Split(s, "_")
for _, val := range chars {
vv := []rune(val)
for i := 0; i < len(vv); i++ {
if i == 0 {
if vv[i] >= 97 && vv[i] <= 122 {
vv[i] -= 32
}
upperStr += string(vv[i])
} else {
upperStr += string(vv[i])
}
}
}
return upperStr
}
func textType(s string) string {
var mysqlTypeToGoType = map[string]string{
"tinyint": "int32",
"smallint": "int32",
"mediumint": "int32",
"int": "int32",
"integer": "int64",
"bigint": "int64",
"float": "float64",
"double": "float64",
"decimal": "float64",
"date": "string",
"time": "string",
"year": "string",
"datetime": "time.Time",
"timestamp": "time.Time",
"char": "string",
"varchar": "string",
"tinyblob": "string",
"tinytext": "string",
"blob": "string",
"text": "string",
"mediumblob": "string",
"mediumtext": "string",
"longblob": "string",
"longtext": "string",
}
return mysqlTypeToGoType[s]
}