Add self join support.

generator/templates.go

@@ -2,7 +2,9 @@ package generator
 
 var SqlBuilderTableTemplate = `package table
 
-import "github.com/sub0Zero/go-sqlbuilder/sqlbuilder"
+import (
+	"github.com/sub0Zero/go-sqlbuilder/sqlbuilder"
+)
 
 type {{.ToGoStructName}} struct {
 	sqlbuilder.Table
@@ -15,22 +17,36 @@ type {{.ToGoStructName}} struct {
 	AllColumns sqlbuilder.ColumnList
 }
 
-var {{.ToGoVarName}} = &{{.ToGoStructName}}{
-	Table: *sqlbuilder.NewTable("{{.DatabaseInfo.SchemaName}}", "{{.Name}}", {{.ToGoColumnFieldList ", "}}),
-	
-	//Columns
+var {{.ToGoVarName}} = new{{.ToGoStructName}}()
+
+func new{{.ToGoStructName}}() *{{.ToGoStructName}} {
+	var (
+	{{- range .Columns}}
+		{{.ToGoVarName}} = sqlbuilder.IntColumn("{{.Name}}", {{if .IsNullable}}sqlbuilder.Nullable{{else}}sqlbuilder.NotNullable{{end}})
+	{{- end}}
+	)
+
+	return &{{.ToGoStructName}}{
+		Table: *sqlbuilder.NewTable("{{.DatabaseInfo.SchemaName}}", "{{.Name}}", {{.ToGoColumnFieldList ", "}}),
+
+		//Columns
 {{- range .Columns}}
-	{{.ToGoFieldName}}: {{.ToGoVarName}},
+		{{.ToGoFieldName}}: {{.ToGoVarName}},
 {{- end}}
 
-	AllColumns: sqlbuilder.ColumnList{ {{.ToGoColumnFieldList ", "}} },
+		AllColumns: sqlbuilder.ColumnList{ {{.ToGoColumnFieldList ", "}} },
+	}
+}
+
+
+func (a *{{.ToGoStructName}}) As(alias string) *{{.ToGoStructName}} {
+	aliasTable := new{{.ToGoStructName}}()
+
+	aliasTable.Table.SetAlias(alias)
+
+	return aliasTable
 }
 
-var (
-{{- range .Columns}}
-	{{.ToGoVarName}} = sqlbuilder.IntColumn("{{.Name}}", {{if .IsNullable}}sqlbuilder.Nullable{{else}}sqlbuilder.NotNullable{{end}})
-{{- end}}
-)
 `
 
 var DataModelTemplate = `package model