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bee/generate/g_model.go

280 lines
7.7 KiB

// Copyright 2013 bee authors
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.
package generate
import (
"errors"
"fmt"
"os"
"path"
"strings"
beeLogger "github.com/beego/bee/logger"
"github.com/beego/bee/logger/colors"
"github.com/beego/bee/utils"
)
func GenerateModel(mname, fields, currpath string) {
w := colors.NewColorWriter(os.Stdout)
p, f := path.Split(mname)
modelName := strings.Title(f)
packageName := "models"
if p != "" {
i := strings.LastIndex(p[:len(p)-1], "/")
packageName = p[i+1 : len(p)-1]
}
modelStruct, hastime, err := getStruct(modelName, fields)
if err != nil {
beeLogger.Log.Fatalf("Could not generate the model struct: %s", err)
}
beeLogger.Log.Infof("Using '%s' as model name", modelName)
beeLogger.Log.Infof("Using '%s' as package name", packageName)
fp := path.Join(currpath, "models", p)
if _, err := os.Stat(fp); os.IsNotExist(err) {
// Create the model's directory
if err := os.MkdirAll(fp, 0777); err != nil {
beeLogger.Log.Fatalf("Could not create the model directory: %s", err)
}
}
fpath := path.Join(fp, strings.ToLower(modelName)+".go")
if f, err := os.OpenFile(fpath, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0666); err == nil {
defer utils.CloseFile(f)
content := strings.Replace(modelTpl, "{{packageName}}", packageName, -1)
content = strings.Replace(content, "{{modelName}}", modelName, -1)
content = strings.Replace(content, "{{modelStruct}}", modelStruct, -1)
if hastime {
content = strings.Replace(content, "{{timePkg}}", `"time"`, -1)
} else {
content = strings.Replace(content, "{{timePkg}}", "", -1)
}
f.WriteString(content)
// Run 'gofmt' on the generated source code
utils.FormatSourceCode(fpath)
fmt.Fprintf(w, "\t%s%screate%s\t %s%s\n", "\x1b[32m", "\x1b[1m", "\x1b[21m", fpath, "\x1b[0m")
} else {
beeLogger.Log.Fatalf("Could not create model file: %s", err)
}
}
func getStruct(structname, fields string) (string, bool, error) {
if fields == "" {
return "", false, errors.New("fields cannot be empty")
}
hastime := false
structStr := "type " + structname + " struct{\n"
fds := strings.Split(fields, ",")
for i, v := range fds {
kv := strings.SplitN(v, ":", 2)
if len(kv) != 2 {
return "", false, errors.New("the fields format is wrong. Should be key:type,key:type " + v)
}
typ, tag, hastimeinner := getType(kv[1])
if typ == "" {
return "", false, errors.New("the fields format is wrong. Should be key:type,key:type " + v)
}
if i == 0 && strings.ToLower(kv[0]) != "id" {
structStr = structStr + "Id int64 `orm:\"auto\"`\n"
}
if hastimeinner {
hastime = true
}
structStr = structStr + utils.CamelString(kv[0]) + " " + typ + " " + tag + "\n"
}
structStr += "}\n"
return structStr, hastime, nil
}
// fields support type
// http://beego.me/docs/mvc/model/models.md#mysql
func getType(ktype string) (kt, tag string, hasTime bool) {
kv := strings.SplitN(ktype, ":", 2)
switch kv[0] {
case "string":
if len(kv) == 2 {
return "string", "`orm:\"size(" + kv[1] + ")\"`", false
}
return "string", "`orm:\"size(128)\"`", false
case "text":
return "string", "`orm:\"type(longtext)\"`", false
case "auto":
return "int64", "`orm:\"auto\"`", false
case "pk":
return "int64", "`orm:\"pk\"`", false
case "datetime":
return "time.Time", "`orm:\"type(datetime)\"`", true
case "int", "int8", "int16", "int32", "int64":
fallthrough
case "uint", "uint8", "uint16", "uint32", "uint64":
fallthrough
case "bool":
fallthrough
case "float32", "float64":
return kv[0], "", false
case "float":
return "float64", "", false
}
return "", "", false
}
var modelTpl = `package {{packageName}}
import (
"errors"
"fmt"
"reflect"
"strings"
{{timePkg}}
"github.com/astaxie/beego/orm"
)
{{modelStruct}}
func init() {
orm.RegisterModel(new({{modelName}}))
}
// Add{{modelName}} insert a new {{modelName}} into database and returns
// last inserted Id on success.
func Add{{modelName}}(m *{{modelName}}) (id int64, err error) {
o := orm.NewOrm()
id, err = o.Insert(m)
return
}
// Get{{modelName}}ById retrieves {{modelName}} by Id. Returns error if
// Id doesn't exist
func Get{{modelName}}ById(id int64) (v *{{modelName}}, err error) {
o := orm.NewOrm()
v = &{{modelName}}{Id: id}
if err = o.Read(v); err == nil {
return v, nil
}
return nil, err
}
// GetAll{{modelName}} retrieves all {{modelName}} matches certain condition. Returns empty list if
// no records exist
func GetAll{{modelName}}(query map[string]string, fields []string, sortby []string, order []string,
offset int64, limit int64) (ml []interface{}, err error) {
o := orm.NewOrm()
qs := o.QueryTable(new({{modelName}}))
// query k=v
for k, v := range query {
// rewrite dot-notation to Object__Attribute
k = strings.Replace(k, ".", "__", -1)
qs = qs.Filter(k, v)
}
// order by:
var sortFields []string
if len(sortby) != 0 {
if len(sortby) == len(order) {
// 1) for each sort field, there is an associated order
for i, v := range sortby {
orderby := ""
if order[i] == "desc" {
orderby = "-" + v
} else if order[i] == "asc" {
orderby = v
} else {
return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
}
sortFields = append(sortFields, orderby)
}
qs = qs.OrderBy(sortFields...)
} else if len(sortby) != len(order) && len(order) == 1 {
// 2) there is exactly one order, all the sorted fields will be sorted by this order
for _, v := range sortby {
orderby := ""
if order[0] == "desc" {
orderby = "-" + v
} else if order[0] == "asc" {
orderby = v
} else {
return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
}
sortFields = append(sortFields, orderby)
}
} else if len(sortby) != len(order) && len(order) != 1 {
return nil, errors.New("Error: 'sortby', 'order' sizes mismatch or 'order' size is not 1")
}
} else {
if len(order) != 0 {
return nil, errors.New("Error: unused 'order' fields")
}
}
var l []{{modelName}}
qs = qs.OrderBy(sortFields...)
if _, err = qs.Limit(limit, offset).All(&l, fields...); err == nil {
if len(fields) == 0 {
for _, v := range l {
ml = append(ml, v)
}
} else {
// trim unused fields
for _, v := range l {
m := make(map[string]interface{})
val := reflect.ValueOf(v)
for _, fname := range fields {
m[fname] = val.FieldByName(fname).Interface()
}
ml = append(ml, m)
}
}
return ml, nil
}
return nil, err
}
// Update{{modelName}} updates {{modelName}} by Id and returns error if
// the record to be updated doesn't exist
func Update{{modelName}}ById(m *{{modelName}}) (err error) {
o := orm.NewOrm()
v := {{modelName}}{Id: m.Id}
// ascertain id exists in the database
if err = o.Read(&v); err == nil {
var num int64
if num, err = o.Update(m); err == nil {
fmt.Println("Number of records updated in database:", num)
}
}
return
}
// Delete{{modelName}} deletes {{modelName}} by Id and returns error if
// the record to be deleted doesn't exist
func Delete{{modelName}}(id int64) (err error) {
o := orm.NewOrm()
v := {{modelName}}{Id: id}
// ascertain id exists in the database
if err = o.Read(&v); err == nil {
var num int64
if num, err = o.Delete(&{{modelName}}{Id: id}); err == nil {
fmt.Println("Number of records deleted in database:", num)
}
}
return
}
`