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golang.go
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golang.go
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// Copyright 2019 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package language
import (
"errors"
"fmt"
"go/format"
"html/template"
"reflect"
"sort"
"strings"
"github.com/fairyhunter13/xorm/schemas"
)
// Golang represents a golang language
var Golang = Language{
Name: "golang",
Template: defaultGolangTemplate,
Types: map[string]string{},
Funcs: template.FuncMap{
"Type": typestring,
"Tag": tag,
},
Formatter: formatGo,
Importter: genGoImports,
ExtName: ".go",
}
func init() {
RegisterLanguage(&Golang)
}
var (
errBadComparisonType = errors.New("invalid type for comparison")
errBadComparison = errors.New("incompatible types for comparison")
errNoComparison = errors.New("missing argument for comparison")
defaultGolangTemplate = fmt.Sprintf(`package models
{{$ilen := len .Imports}}{{if gt $ilen 0}}import (
{{range .Imports}}"{{.}}"{{end}}
){{end}}
{{range .Tables}}
type {{TableMapper .Name}} struct {
{{$table := .}}{{range .ColumnsSeq}}{{$col := $table.GetColumn .}} {{ColumnMapper $col.Name}} {{Type $col}} %s{{Tag $table $col}}%s
{{end}}
}
{{end}}
`, "`", "`")
)
type kind int
const (
invalidKind kind = iota
boolKind
complexKind
intKind
floatKind
integerKind
stringKind
uintKind
)
func basicKind(v reflect.Value) (kind, error) {
switch v.Kind() {
case reflect.Bool:
return boolKind, nil
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return intKind, nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return uintKind, nil
case reflect.Float32, reflect.Float64:
return floatKind, nil
case reflect.Complex64, reflect.Complex128:
return complexKind, nil
case reflect.String:
return stringKind, nil
}
return invalidKind, errBadComparisonType
}
func getCol(cols map[string]*schemas.Column, name string) *schemas.Column {
return cols[strings.ToLower(name)]
}
func formatGo(src string) (string, error) {
source, err := format.Source([]byte(src))
if err != nil {
return "", err
}
return string(source), nil
}
func genGoImports(tables []*schemas.Table) []string {
imports := make(map[string]string)
results := make([]string, 0)
for _, table := range tables {
for _, col := range table.Columns() {
if typestring(col) == "time.Time" {
if _, ok := imports["time"]; !ok {
imports["time"] = "time"
results = append(results, "time")
}
}
}
}
return results
}
func typestring(col *schemas.Column) string {
st := col.SQLType
t := schemas.SQLType2Type(st)
s := t.String()
if s == "[]uint8" {
s = "[]byte"
}
return addPointer(s, col.Nullable)
}
func addPointer(typeStr string, isNullable bool) string {
if isNullable {
return "*" + typeStr
}
return typeStr
}
func tag(table *schemas.Table, col *schemas.Column) template.HTML {
var res []string
colName := "'" + col.Name + "'"
res = append(res, colName)
if !col.Nullable {
res = append(res, "notnull")
} else {
res = append(res, "null")
}
if col.IsPrimaryKey {
res = append(res, "pk")
}
if col.Default != "" {
res = append(res, fmt.Sprintf("default(%s)", col.Default))
}
if col.IsAutoIncrement {
res = append(res, "autoincr")
}
/*if col.SQLType.IsTime() && include(created, col.Name) {
res = append(res, "created")
}
if col.SQLType.IsTime() && include(updated, col.Name) {
res = append(res, "updated")
}
if col.SQLType.IsTime() && include(deleted, col.Name) {
res = append(res, "deleted")
}*/
if /*supportComment &&*/ col.Comment != "" {
res = append(res, fmt.Sprintf("comment('%s')", col.Comment))
}
names := make([]string, 0, len(col.Indexes))
for name := range col.Indexes {
names = append(names, name)
}
sort.Strings(names)
for _, name := range names {
index := table.Indexes[name]
var uistr string
if index.Type == schemas.UniqueType {
uistr = "unique"
} else if index.Type == schemas.IndexType {
uistr = "index"
}
if len(index.Cols) > 1 {
uistr += "(" + index.Name + ")"
}
res = append(res, uistr)
}
nstr := schemas.OriginalTypeName(col.SQLType)
if col.Length != 0 {
if col.Length2 != 0 {
nstr += fmt.Sprintf("(%v,%v)", col.Length, col.Length2)
} else {
nstr += fmt.Sprintf("(%v)", col.Length)
}
} else if len(col.EnumOptions) > 0 { //enum
nstr += "("
opts := ""
enumOptions := make([]string, 0, len(col.EnumOptions))
for enumOption := range col.EnumOptions {
enumOptions = append(enumOptions, enumOption)
}
sort.Strings(enumOptions)
for _, v := range enumOptions {
opts += fmt.Sprintf(",'%v'", v)
}
nstr += strings.TrimLeft(opts, ",")
nstr += ")"
} else if len(col.SetOptions) > 0 { //enum
nstr += "("
opts := ""
setOptions := make([]string, 0, len(col.SetOptions))
for setOption := range col.SetOptions {
setOptions = append(setOptions, setOption)
}
sort.Strings(setOptions)
for _, v := range setOptions {
opts += fmt.Sprintf(",'%v'", v)
}
nstr += strings.TrimLeft(opts, ",")
nstr += ")"
}
res = append(res, nstr)
if len(res) > 0 {
return template.HTML(fmt.Sprintf(`xorm:"%s"`, strings.Join(res, " ")))
}
return ""
}
func include(source []string, target string) bool {
for _, s := range source {
if s == target {
return true
}
}
return false
}