Include mysql column comments into generated types

generator/metadata/column_meta_data.go

@@ -7,6 +7,7 @@ type Column struct {
 	IsNullable   bool
 	IsGenerated  bool
 	DataType     DataType
+	Comment      string
 }
 
 // DataTypeKind is database type kind(base, enum, user-defined, array)

generator/mysql/query_set.go

@@ -36,6 +36,7 @@ func (m mySqlQuerySet) GetTableColumnsMetaData(db *sql.DB, schemaName string, ta
 	query := `
 SELECT COLUMN_NAME AS "column.Name", 
 	IS_NULLABLE = "YES" AS "column.IsNullable",
+	columns.COLUMN_COMMENT as "column.Comment",
 	(EXISTS(
 		SELECT 1
 		FROM information_schema.table_constraints t

generator/template/file_templates.go

@@ -32,7 +32,7 @@ type {{structImplName}} struct {
 	// Columns
 {{- range $i, $c := .Columns}}
 {{- $field := columnField $c}}
-	{{$field.Name}} {{dialect.PackageName}}.Column{{$field.Type}}
+	{{$field.Name}} {{dialect.PackageName}}.Column{{$field.Type}} {{- if $c.Comment }} // {{$c.Comment}} {{end}}
 {{- end}}
 
 	AllColumns     {{dialect.PackageName}}.ColumnList
@@ -123,7 +123,7 @@ import (
 type {{$modelTableTemplate.TypeName}} struct {
 {{- range .Columns}}
 {{- $field := structField .}}
-	{{$field.Name}} {{$field.Type.Name}} ` + "{{$field.TagsString}}" + `
+	{{$field.Name}} {{$field.Type.Name}} ` + "{{$field.TagsString}}" + ` {{- if .Comment }} // {{.Comment}} {{end}}
 {{- end}}
 }
 

tests/mysql/generator_test.go

@@ -198,6 +198,26 @@ func assertGeneratedFiles(t *testing.T) {
 	testutils.AssertFileContent(t, genTestDir3+"/dvds/model/actor.go", actorModelFile)
 }
 
+func TestModelColumnComment(t *testing.T) {
+	testutils.AssertFileContent(t, "./../.gentestdata/mysql/test_sample/model/link.go", `
+//
+// Code generated by go-jet DO NOT EDIT.
+//
+// WARNING: Changes to this file may cause incorrect behavior
+// and will be lost if the code is regenerated
+//
+
+package model
+
+type Link struct {
+	ID          int32   `+"`sql:\"primary_key\"`"+` // this is link id
+	URL         string  // link url
+	Name        string  // link name
+	Description *string // this is link description
+}
+`)
+}
+
 var mpaaRatingEnumFile = `
 //
 // Code generated by go-jet DO NOT EDIT.