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Update: fixing some methods and adding documentation
Signed-off-by: Gnanakeethan Balasubramaniam <gnanakeethan@gmail.com>
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@ -63,6 +63,19 @@ type RenameColumn struct {
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Column
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}
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// CreateTable creates the table on system
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func (m *Migration) CreateTable(tablename, engine, charset string, p ...func()) {
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m.TableName = tablename
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m.Engine = engine
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m.Charset = charset
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m.ModifyType = "create"
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}
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func (m *Migration) AlterTable(tablename string) {
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m.TableName = tablename
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m.ModifyType = "alter"
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}
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// NewCol creates a new standard column and attaches it to m struct
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func (m *Migration) NewCol(name string) *Column {
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col := &Column{Name: name}
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48
migration/doc.go
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48
migration/doc.go
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@ -0,0 +1,48 @@
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package migration
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/* Package migration enables you to generate migrations back and forth. It generates both migrations.
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//Creates a table
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m.CreateTable("tablename","InnoDB","utf8");
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//Alter a table
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m.AlterTable("tablename")
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//Standard Column Methods
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* SetDataType
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* SetNullable
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* SetDefault
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* SetUnsigned (use only on integer types unless produces error)
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//Sets a primary column, multiple calls allowed, standard column methods available
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m.PriCol("id").SetAuto(true).SetNullable(false).SetDataType("INT(10)").SetUnsigned(true)
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//UniCol Can be used multiple times, allows standard Column methods. Use same "index" string to add to same index
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m.UniCol("index","column")
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//Standard Column Initialisation, can call .Remove() after NewCol("") on alter to remove
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m.NewCol("name").SetDataType("VARCHAR(255) COLLATE utf8_unicode_ci").SetNullable(false)
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m.NewCol("value").SetDataType("DOUBLE(8,2)").SetNullable(false)
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//Rename Columns , only use with Alter table, doesn't works with Create, prefix standard column methods with "Old" to
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//create a true reversible migration eg: SetOldDataType("DOUBLE(12,3)")
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m.RenameColumn("from","to")...
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//Foreign Columns, single columns are only supported, SetOnDelete & SetOnUpdate are available, call appropriately.
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//Supports standard column methods, automatic reverse.
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m.ForeignCol("local_col","foreign_col","foreign_table")
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*/
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@ -52,6 +52,7 @@ type Migrationer interface {
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GetCreated() int64
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}
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//Migration defines the migrations by either SQL or DDL
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type Migration struct {
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sqls []string
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Created string
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@ -82,11 +83,24 @@ func init() {
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// Up implement in the Inheritance struct for upgrade
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func (m *Migration) Up() {
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switch m.ModifyType {
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case "reverse":
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m.ModifyType = "alter"
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case "delete":
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m.ModifyType = "create"
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}
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m.sqls = append(m.sqls, m.GetSQL())
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}
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// Down implement in the Inheritance struct for down
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func (m *Migration) Down() {
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switch m.ModifyType {
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case "alter":
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m.ModifyType = "reverse"
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case "create":
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m.ModifyType = "delete"
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}
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m.sqls = append(m.sqls, m.GetSQL())
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}
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//Migrate adds the SQL to the execution list
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