/
generator_model.go
372 lines (345 loc) · 11 KB
/
generator_model.go
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package create
import (
"bytes"
"fmt"
"go/ast"
"strings"
"text/template"
"github.com/henrylee2cn/goutil"
tp "github.com/henrylee2cn/teleport"
)
func (mod *Model) createModel(t *TypeStruct) {
st, ok := t.expr.(*ast.StructType)
if !ok {
tp.Fatalf("[micro] the type of model must be struct: %s", t.Name)
}
mod.NameSql = fmt.Sprintf("`%s`", mod.SnakeName)
mod.QuerySql = [2]string{}
mod.UpdateSql = ""
mod.UpsertSqlSuffix = ""
var (
fields []string
querySql1, querySql2 string
hasId, hasCreatedAt, hasUpdatedAt bool
)
for _, field := range st.Fields.List {
if len(field.Names) == 0 {
tp.Fatalf("[micro] the type of model can't have anonymous field")
}
name := field.Names[0].Name
if !goutil.IsExportedName(name) {
continue
}
name = goutil.SnakeString(name)
switch name {
case "id":
hasId = true
case "created_at":
hasCreatedAt = true
case "updated_at":
hasUpdatedAt = true
}
fields = append(fields, name)
}
if !hasId {
t.appendHeadField(`Id int64`)
fields = append([]string{"id"}, fields...)
}
if !hasCreatedAt {
t.appendTailField(`CreatedAt int64`)
fields = append(fields, "created_at")
}
if !hasUpdatedAt {
t.appendTailField(`UpdatedAt int64`)
fields = append(fields, "updated_at")
}
mod.StructDefinition = fmt.Sprintf("\n%stype %s %s\n", t.Doc, t.Name, addTag(t.Body))
for _, field := range fields {
if field == "id" {
continue
}
querySql1 += fmt.Sprintf("`%s`,", field)
querySql2 += fmt.Sprintf(":%s,", field)
if field == "created_at" {
continue
}
mod.UpdateSql += fmt.Sprintf("`%s`=:%s,", field, field)
mod.UpsertSqlSuffix += fmt.Sprintf("`%s`=VALUES(`%s`),", field, field)
}
mod.QuerySql = [2]string{querySql1[:len(querySql1)-1], querySql2[:len(querySql2)-1]}
mod.UpdateSql = mod.UpdateSql[:len(mod.UpdateSql)-1]
mod.UpsertSqlSuffix = mod.UpsertSqlSuffix[:len(mod.UpsertSqlSuffix)-1] + ";"
m, err := template.New("").Parse(modelTpl)
if err != nil {
panic(err)
}
buf := bytes.NewBuffer(nil)
err = m.Execute(buf, mod)
if err != nil {
panic(err)
}
mod.code = buf.String()
}
func (t *TypeStruct) appendHeadField(fieldLine string) {
idx := strings.Index(t.Body, "{") + 1
t.Body = t.Body[:idx] + "\n" + fieldLine + "\n" + t.Body[idx:]
}
func (t *TypeStruct) appendTailField(fieldLine string) {
idx := strings.LastIndex(t.Body, "}")
t.Body = t.Body[:idx] + "\n" + fieldLine + "\n" + t.Body[idx:]
}
const modelTpl = `package model
import (
"database/sql"
"time"
tp "github.com/henrylee2cn/teleport"
"github.com/henrylee2cn/goutil/coarsetime"
"github.com/xiaoenai/tp-micro/model/mysql"
"github.com/xiaoenai/tp-micro/model/sqlx"
)
{{.StructDefinition}}
// TableName implements 'github.com/xiaoenai/tp-micro/model'.Cacheable
func (*{{.Name}}) TableName() string {
return "{{.SnakeName}}"
}
var {{.LowerFirstName}}DB, _ = dbHandler.RegCacheableDB(new({{.Name}}), time.Hour*24, ` + "``" + `)
// Get{{.Name}}DB returns the {{.Name}} DB handler.
func Get{{.Name}}DB() *mysql.CacheableDB {
return {{.LowerFirstName}}DB
}
// Insert{{.Name}} insert a {{.Name}} data into database.
// NOTE:
// Without cache layer.
func Insert{{.Name}}(_{{.LowerFirstLetter}} *{{.Name}}, tx ...*sqlx.Tx) (int64, error) {
_{{.LowerFirstLetter}}.UpdatedAt = coarsetime.FloorTimeNow().Unix()
if _{{.LowerFirstLetter}}.CreatedAt == 0 {
_{{.LowerFirstLetter}}.CreatedAt = _{{.LowerFirstLetter}}.UpdatedAt
}
err := {{.LowerFirstName}}DB.Callback(func(tx sqlx.DbOrTx) error {
var query string
if _{{.LowerFirstLetter}}.Id > 0 {
query = "INSERT INTO {{.NameSql}} (id,{{index .QuerySql 0}})VALUES(:id,{{index .QuerySql 1}});"
} else {
query = "INSERT INTO {{.NameSql}} ({{index .QuerySql 0}})VALUES({{index .QuerySql 1}});"
}
r, err := tx.NamedExec(query, _{{.LowerFirstLetter}})
if err != nil {
return err
}
id, err := r.LastInsertId()
if err != nil {
return err
}
_{{.LowerFirstLetter}}.Id = id
return nil
}, tx...)
return _{{.LowerFirstLetter}}.Id, err
}
// Update{{.Name}}ByPrimary update the {{.Name}} data in database by primary key.
// NOTE:
// With cache layer;
// _updateFields' members must be snake format;
// Automatic update updated_at field;
// Don't update the primary key and the created_at key;
// Update all fields except the primary key and the created_at key if _updateFields is empty.
func Update{{.Name}}ByPrimary(_{{.LowerFirstLetter}} *{{.Name}}, _updateFields []string, tx ...*sqlx.Tx) error {
_{{.LowerFirstLetter}}.UpdatedAt = coarsetime.FloorTimeNow().Unix()
err := {{.LowerFirstName}}DB.Callback(func(tx sqlx.DbOrTx) error {
query := "UPDATE {{.NameSql}} SET "
if len(_updateFields) == 0 {
query += "{{.UpdateSql}} WHERE id=:id LIMIT 1;"
} else {
for _, s := range _updateFields {
if s == "updated_at" || s == "id" || s == "created_at" {
continue
}
query += ` + "\"`\" + s + \"`=:\" + s + \",\"" + `
}
if query[len(query)-1] != ',' {
return nil
}
query += ` + "\"`updated_at`=:updated_at WHERE id=:id LIMIT 1;\"" + `
}
_, err := tx.NamedExec(query, _{{.LowerFirstLetter}})
return err
}, tx...)
if err != nil {
return err
}
err = {{.LowerFirstName}}DB.DeleteCache(_{{.LowerFirstLetter}})
if err != nil {
tp.Errorf("%s", err.Error())
}
return nil
}
// Upsert{{.Name}} insert or update the {{.Name}} data by primary key.
// NOTE:
// With cache layer;
// Insert data if the primary key is specified;
// Update data based on _updateFields if no primary key is specified;
// _updateFields' members must be snake format;
// Automatic update updated_at field;
// Don't update the primary key and the created_at key;
// Update all fields except the primary key and the created_at key if _updateFields is empty.
func Upsert{{.Name}}(_{{.LowerFirstLetter}} *{{.Name}}, _updateFields []string, tx ...*sqlx.Tx) (int64, error) {
if _{{.LowerFirstLetter}}.Id <= 0 {
return Insert{{.Name}}(_{{.LowerFirstLetter}}, tx ...)
}
if _{{.LowerFirstLetter}}.UpdatedAt == 0 {
_{{.LowerFirstLetter}}.UpdatedAt = coarsetime.FloorTimeNow().Unix()
}
if _{{.LowerFirstLetter}}.CreatedAt == 0 {
_{{.LowerFirstLetter}}.CreatedAt = _{{.LowerFirstLetter}}.UpdatedAt
}
err := {{.LowerFirstName}}DB.Callback(func(tx sqlx.DbOrTx) error {
query := "INSERT INTO {{.NameSql}} (id,{{index .QuerySql 0}})VALUES(:id,{{index .QuerySql 1}})" +
" ON DUPLICATE KEY UPDATE "
if len(_updateFields) == 0 {
query += "{{.UpsertSqlSuffix}}"
} else {
for _, s := range _updateFields {
if s == "updated_at" || s == "id" || s == "created_at" {
continue
}
query += ` + "\"`\" + s + \"`=VALUES(`\" + s + \"`),\"" + `
}
if query[len(query)-1] != ',' {
return nil
}
query += ` + "\"`updated_at`=VALUES(`updated_at`);\"" + `
}
_, err := tx.NamedExec(query, _{{.LowerFirstLetter}})
return err
}, tx...)
if err != nil {
return 0, err
}
err = {{.LowerFirstName}}DB.DeleteCache(_{{.LowerFirstLetter}})
if err != nil {
tp.Errorf("%s", err.Error())
}
return _{{.LowerFirstLetter}}.Id, nil
}
// Delete{{.Name}}ByPrimary delete a {{.Name}} data in database by primary key.
// NOTE:
// With cache layer.
func Delete{{.Name}}ByPrimary(id int64, tx ...*sqlx.Tx) error {
err := {{.LowerFirstName}}DB.Callback(func(tx sqlx.DbOrTx) error {
_, err := tx.Exec("DELETE FROM {{.NameSql}} WHERE id=?;", id)
return err
}, tx...)
if err != nil {
return err
}
err = {{.LowerFirstName}}DB.PutCache(&{{.Name}}{
Id: id,
})
if err != nil {
tp.Errorf("%s", err.Error())
}
return nil
}
// Get{{.Name}}ByPrimary query a {{.Name}} data from database by primary key.
// NOTE:
// With cache layer;
// If @return bool=false error=nil, means the data is not exist.
func Get{{.Name}}ByPrimary(id int64) (*{{.Name}}, bool, error) {
var _{{.LowerFirstLetter}} = &{{.Name}}{
Id: id,
}
err := {{.LowerFirstName}}DB.CacheGet(_{{.LowerFirstLetter}})
switch err {
case nil:
if _{{.LowerFirstLetter}}.CreatedAt == 0 {
return nil, false, nil
}
return _{{.LowerFirstLetter}}, true, nil
case sql.ErrNoRows:
err2 := {{.LowerFirstName}}DB.PutCache(_{{.LowerFirstLetter}})
if err2 != nil {
tp.Errorf("%s", err2.Error())
}
return nil, false, nil
default:
return nil, false, err
}
}
// Bind{{.Name}}ByFields query the {{.Name}} data from database by field keys, and bind it to _{{.LowerFirstLetter}}.
// NOTE:
// With cache layer;
// _fields' members should be snake format;
// Query by the primary key field if fields is empty;
// If @return bool=false error=nil, means the data is not exist.
func Bind{{.Name}}ByFields(_{{.LowerFirstLetter}} *{{.Name}}, _fields ...string) (bool, error) {
err := {{.LowerFirstName}}DB.CacheGet(_{{.LowerFirstLetter}}, _fields...)
switch err {
case nil:
if _{{.LowerFirstLetter}}.CreatedAt == 0 {
return false, nil
}
return true, nil
case sql.ErrNoRows:
err2 := {{.LowerFirstName}}DB.PutCache(_{{.LowerFirstLetter}})
if err2 != nil {
tp.Errorf("%s", err2.Error())
}
return false, nil
default:
return false, err
}
}
// Bind{{.Name}}ByWhere query the {{.Name}} data from database by WHERE condition(whereNamedCond), and bind it to _{{.LowerFirstLetter}}.
// NOTE:
// With cache layer;
// If @return bool=false error=nil, means the data is not exist;
// whereNamedCond e.g. 'id=:id AND created_at>1520000000'.
func Bind{{.Name}}ByWhere(_{{.LowerFirstLetter}} *{{.Name}}, whereNamedCond string) (bool, error) {
err := {{.LowerFirstName}}DB.CacheGetByWhere(_{{.LowerFirstLetter}}, whereNamedCond)
switch err {
case nil:
if _{{.LowerFirstLetter}}.CreatedAt == 0 {
return false, nil
}
return true, nil
case sql.ErrNoRows:
err2 := {{.LowerFirstName}}DB.PutCache(_{{.LowerFirstLetter}})
if err2 != nil {
tp.Errorf("%s", err2.Error())
}
return false, nil
default:
return false, err
}
}
// Get{{.Name}}ByWhere query a {{.Name}} data from database by WHERE condition.
// NOTE:
// Without cache layer;
// If @return bool=false error=nil, means the data is not exist.
func Get{{.Name}}ByWhere(whereCond string, arg ...interface{}) (*{{.Name}}, bool, error) {
var _{{.LowerFirstLetter}} = new({{.Name}})
err := {{.LowerFirstName}}DB.Get(_{{.LowerFirstLetter}}, "SELECT id,{{index .QuerySql 0}} FROM {{.NameSql}} WHERE "+whereCond+" LIMIT 1;", arg...)
switch err {
case nil:
return _{{.LowerFirstLetter}}, true, nil
case sql.ErrNoRows:
return nil, false, nil
default:
return nil, false, err
}
}
// Select{{.Name}}ByWhere query some {{.Name}} data from database by WHERE condition.
// NOTE:
// Without cache layer.
func Select{{.Name}}ByWhere(whereCond string, arg ...interface{}) ([]*{{.Name}}, error) {
var objs = new([]*{{.Name}})
err := {{.LowerFirstName}}DB.Select(objs, "SELECT id,{{index .QuerySql 0}} FROM {{.NameSql}} WHERE "+whereCond, arg...)
return *objs, err
}
// Count{{.Name}}ByWhere count {{.Name}} data number from database by WHERE condition.
// NOTE:
// Without cache layer.
func Count{{.Name}}ByWhere(whereCond string, arg ...interface{}) (int64, error) {
var count int64
err := {{.LowerFirstName}}DB.Get(&count, "SELECT count(1) FROM {{.NameSql}} WHERE "+whereCond, arg...)
return count, err
}`