add quick example

tools/goctl/model/sql/example/generator.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # generate model with cache from ddl
- goctl model mysql ddl -src="./sql/user.sql" -dir="./sql/model" -c=true
+goctl model mysql ddl -src="./sql/user.sql" -dir="./sql/model" -c
 
 # generate model with cache from data source
- goctl model mysql datasource -url="user:password@tcp(127.0.0.1:3306)/database" -table="table1,table2"  -dir="./model"
+goctl model mysql datasource -url="user:password@tcp(127.0.0.1:3306)/database" -table="table1,table2"  -dir="./model"

tools/goctl/model/sql/gen/error.go

@@ -2,6 +2,4 @@ package gen
 
 import "errors"
 
-var (
-	ErrCircleQuery = errors.New("circle query with other fields")
-)
+var ErrCircleQuery = errors.New("circle query with other fields")

tools/goctl/model/sql/gen/gen.go

@@ -82,7 +82,7 @@ func (g *defaultGenerator) Start(withCache bool) error {
 		}
 	}
 	// generate error file
-	filename := filepath.Join(dirAbs, "error.go")
+	filename := filepath.Join(dirAbs, "vars.go")
 	if !util.FileExists(filename) {
 		err = ioutil.WriteFile(filename, []byte(template.Error), os.ModePerm)
 		if err != nil {

tools/goctl/model/sql/template/delete.go

@@ -6,6 +6,7 @@ func (m *{{.upperStartCamelObject}}Model) Delete({{.lowerStartCamelPrimaryKey}}
 	if err!=nil{
 		return err
 	}{{end}}
+
 	{{.keys}}
     _, err {{if .containsIndexCache}}={{else}}:={{end}} m.Exec(func(conn sqlx.SqlConn) (result sql.Result, err error) {
 		query := ` + "`" + `delete from ` + "` +" + ` m.table + ` + " `" + ` where {{.originalPrimaryKey}} = ?` + "`" + `

tools/goctl/model/sql/template/errors.go

@@ -4,8 +4,5 @@ var Error = `package model
 
 import "github.com/tal-tech/go-zero/core/stores/sqlx"
 
-var (
-	ErrNotFound = sqlx.ErrNotFound
-)
-
+var ErrNotFound = sqlx.ErrNotFound
 `