Add sqlschema

dialects/common/sqlschema/sqlschema.go

@@ -0,0 +1,72 @@
+package sqlschema
+
+import (
+	"database/sql"
+	"fmt"
+	"strconv"
+
+	"github.com/jinzhu/gorm/schema"
+)
+
+// SQLSchema sql schema
+type SQLSchema struct {
+	*schema.Schema
+	Fields []*Field
+}
+
+// Field SQLSchema Field
+type Field struct {
+	*schema.Field
+	DataType  sql.NullString
+	Precision sql.NullInt64
+	Length    sql.NullInt64
+	Nullable  sql.NullBool
+	Unique    sql.NullBool
+}
+
+// Parse parse sql schema
+func Parse(dest interface{}) *SQLSchema {
+	s := schema.Parse(dest)
+
+	sqlSchema := &SQLSchema{
+		Schema: s,
+	}
+
+	for _, f := range s.Fields {
+		if f.IsNormal {
+			field := &Field{Field: f}
+
+			if s, ok := field.TagSettings["TYPE"]; ok {
+				_ = field.DataType.Scan(s)
+			}
+
+			if num, ok := field.TagSettings["SIZE"]; ok {
+				n, err := strconv.Atoi(num)
+				if err != nil {
+					fmt.Println(err)
+				}
+				_ = field.Length.Scan(n)
+			}
+
+			if num, ok := field.TagSettings["PRECISION"]; ok {
+				n, err := strconv.Atoi(num)
+				if err != nil {
+					fmt.Println(err)
+				}
+				_ = field.Precision.Scan(n)
+			}
+
+			if _, ok := field.TagSettings["NOT NULL"]; !ok {
+				_ = field.Nullable.Scan(true)
+			}
+
+			if _, ok := field.TagSettings["UNIQUE"]; ok {
+				_ = field.Nullable.Scan(true)
+			}
+
+			sqlSchema.Fields = append(sqlSchema.Fields, field)
+		}
+	}
+
+	return sqlSchema
+}

dialects/common/sqlschema/types.go

@@ -0,0 +1,19 @@
+package sqlschema
+
+// ColumnType column type
+type ColumnType string
+
+const (
+	// Boolean boolean type
+	Boolean ColumnType = "boolean"
+	// Integer integer type
+	Integer ColumnType = "boolean"
+	// Float float type
+	Float ColumnType = "float"
+	// String string type
+	String ColumnType = "string"
+	// Text long string type
+	Text ColumnType = "text"
+	// Binary binary type
+	Binary ColumnType = "binary"
+)

dialects/sqlite/sqlite.go

@@ -10,6 +10,7 @@ import (
 	"github.com/jinzhu/gorm"
 	"github.com/jinzhu/gorm/dialects/common/sqlbuilder"
 	"github.com/jinzhu/gorm/model"
+	"github.com/jinzhu/gorm/schema"
 )
 
 // Dialect Sqlite3 Dialect for GORM
@@ -319,3 +320,26 @@ func (dialect *Dialect) Delete(tx *gorm.DB) (err error) {
 	_, err = dialect.DB.Exec(s.String(), args...)
 	return
 }
+
+// AutoMigrate auto migrate database
+func (dialect *Dialect) AutoMigrate(value interface{}) (err error) {
+	// create table
+
+	// create missed column
+
+	// safe upgrade some fields (like size, change data type)
+
+	// create missed foreign key
+
+	// create missed index
+	return nil
+}
+
+func (dialect *Dialect) HasTable(name string) bool {
+	return false
+}
+
+func (dialect *Dialect) CreateTable(value interface{}) error {
+	s := schema.Parse(value)
+	return nil
+}