Golang Column.IsPrimaryKey方法代码示例

func (db *mssql) SqlType(c *core.Column) string {
	var res string
	switch t := c.SQLType.Name; t {
	case core.Bool:
		res = core.TinyInt
		if c.Default == "true" {
			c.Default = "1"
		} else if c.Default == "false" {
			c.Default = "0"
		}
	case core.Serial:
		c.IsAutoIncrement = true
		c.IsPrimaryKey = true
		c.Nullable = false
		res = core.Int
	case core.BigSerial:
		c.IsAutoIncrement = true
		c.IsPrimaryKey = true
		c.Nullable = false
		res = core.BigInt
	case core.Bytea, core.Blob, core.Binary, core.TinyBlob, core.MediumBlob, core.LongBlob:
		res = core.VarBinary
		if c.Length == 0 {
			c.Length = 50
		}
	case core.TimeStamp:
		res = core.DateTime
	case core.TimeStampz:
		res = "DATETIMEOFFSET"
		c.Length = 7
	case core.MediumInt:
		res = core.Int
	case core.MediumText, core.TinyText, core.LongText, core.Json:
		res = core.Text
	case core.Double:
		res = core.Real
	default:
		res = t
	}

	if res == core.Int {
		return core.Int
	}

	var hasLen1 bool = (c.Length > 0)
	var hasLen2 bool = (c.Length2 > 0)
	if hasLen2 {
		res += "(" + strconv.Itoa(c.Length) + "," + strconv.Itoa(c.Length2) + ")"
	} else if hasLen1 {
		res += "(" + strconv.Itoa(c.Length) + ")"
	}
	return res
}

func (db *sqlite3) GetColumns(tableName string) ([]string, map[string]*core.Column, error) {
	args := []interface{}{tableName}
	s := "SELECT sql FROM sqlite_master WHERE type='table' and name = ?"
	db.LogSQL(s, args)
	rows, err := db.DB().Query(s, args...)
	if err != nil {
		return nil, nil, err
	}
	defer rows.Close()

	var name string
	for rows.Next() {
		err = rows.Scan(&name)
		if err != nil {
			return nil, nil, err
		}
		break
	}

	if name == "" {
		return nil, nil, errors.New("no table named " + tableName)
	}

	nStart := strings.Index(name, "(")
	nEnd := strings.LastIndex(name, ")")
	reg := regexp.MustCompile(`[^\(,\)]*(\([^\(]*\))?`)
	colCreates := reg.FindAllString(name[nStart+1:nEnd], -1)
	cols := make(map[string]*core.Column)
	colSeq := make([]string, 0)
	for _, colStr := range colCreates {
		reg = regexp.MustCompile(`,\s`)
		colStr = reg.ReplaceAllString(colStr, ",")
		fields := strings.Fields(strings.TrimSpace(colStr))
		col := new(core.Column)
		col.Indexes = make(map[string]int)
		col.Nullable = true
		col.DefaultIsEmpty = true
		for idx, field := range fields {
			if idx == 0 {
				col.Name = strings.Trim(field, "`[] ")
				continue
			} else if idx == 1 {
				col.SQLType = core.SQLType{field, 0, 0}
			}
			switch field {
			case "PRIMARY":
				col.IsPrimaryKey = true
			case "AUTOINCREMENT":
				col.IsAutoIncrement = true
			case "NULL":
				if fields[idx-1] == "NOT" {
					col.Nullable = false
				} else {
					col.Nullable = true
				}
			case "DEFAULT":
				col.Default = fields[idx+1]
				col.DefaultIsEmpty = false
			}
		}
		if !col.SQLType.IsNumeric() && !col.DefaultIsEmpty {
			col.Default = "'" + col.Default + "'"
		}
		cols[col.Name] = col
		colSeq = append(colSeq, col.Name)
	}
	return colSeq, cols, nil
}

func (engine *Engine) mapType(v reflect.Value) *core.Table {
	t := v.Type()
	table := engine.newTable()
	if tb, ok := v.Interface().(TableName); ok {
		table.Name = tb.TableName()
	} else {
		if v.CanAddr() {
			if tb, ok = v.Addr().Interface().(TableName); ok {
				table.Name = tb.TableName()
			}
		}
		if table.Name == "" {
			table.Name = engine.TableMapper.Obj2Table(t.Name())
		}
	}

	table.Type = t

	var idFieldColName string
	var err error
	var hasCacheTag, hasNoCacheTag bool

	for i := 0; i < t.NumField(); i++ {
		tag := t.Field(i).Tag

		ormTagStr := tag.Get(engine.TagIdentifier)
		var col *core.Column
		fieldValue := v.Field(i)
		fieldType := fieldValue.Type()

		if ormTagStr != "" {
			col = &core.Column{FieldName: t.Field(i).Name, Nullable: true, IsPrimaryKey: false,
				IsAutoIncrement: false, MapType: core.TWOSIDES, Indexes: make(map[string]int)}
			tags := splitTag(ormTagStr)

			if len(tags) > 0 {
				if tags[0] == "-" {
					continue
				}
				if strings.ToUpper(tags[0]) == "EXTENDS" {
					switch fieldValue.Kind() {
					case reflect.Ptr:
						f := fieldValue.Type().Elem()
						if f.Kind() == reflect.Struct {
							fieldPtr := fieldValue
							fieldValue = fieldValue.Elem()
							if !fieldValue.IsValid() || fieldPtr.IsNil() {
								fieldValue = reflect.New(f).Elem()
							}
						}
						fallthrough
					case reflect.Struct:
						parentTable := engine.mapType(fieldValue)
						for _, col := range parentTable.Columns() {
							col.FieldName = fmt.Sprintf("%v.%v", t.Field(i).Name, col.FieldName)
							table.AddColumn(col)
							for indexName, indexType := range col.Indexes {
								addIndex(indexName, table, col, indexType)
							}
						}
						continue
					default:
						//TODO: warning
					}
				}

				indexNames := make(map[string]int)
				var isIndex, isUnique bool
				var preKey string
				for j, key := range tags {
					k := strings.ToUpper(key)
					switch {
					case k == "<-":
						col.MapType = core.ONLYFROMDB
					case k == "->":
						col.MapType = core.ONLYTODB
					case k == "PK":
						col.IsPrimaryKey = true
						col.Nullable = false
					case k == "NULL":
						if j == 0 {
							col.Nullable = true
						} else {
							col.Nullable = (strings.ToUpper(tags[j-1]) != "NOT")
						}
					// TODO: for postgres how add autoincr?
					/*case strings.HasPrefix(k, "AUTOINCR(") && strings.HasSuffix(k, ")"):
					col.IsAutoIncrement = true

					autoStart := k[len("AUTOINCR")+1 : len(k)-1]
					autoStartInt, err := strconv.Atoi(autoStart)
					if err != nil {
						engine.LogError(err)
					}
					col.AutoIncrStart = autoStartInt*/
					case k == "AUTOINCR":
						col.IsAutoIncrement = true
						//col.AutoIncrStart = 1
					case k == "DEFAULT":
						col.Default = tags[j+1]
//.........这里部分代码省略.........