fix gorm primary key string types

Author: iesreza

go.mod

@@ -76,6 +76,7 @@ require (
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/rogpeppe/go-internal v1.10.0 // indirect
+	github.com/shopspring/decimal v1.4.0 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.1 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect

go.sum

@@ -198,6 +198,8 @@ github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncj
 github.com/scylladb/termtables v0.0.0-20191203121021-c4c0b6d42ff4/go.mod h1:C1a7PQSMz9NShzorzCiG2fk9+xuCgLkPeCvMHYR2OWg=
 github.com/segmentio/kafka-go v0.4.39 h1:75smaomhvkYRwtuOwqLsdhgCG30B82NsbdkdDfFbvrw=
 github.com/segmentio/kafka-go v0.4.39/go.mod h1:T0MLgygYvmqmBvC+s8aCcbVNfJN4znVne5j0Pzowp/Q=
+github.com/shopspring/decimal v1.4.0 h1:bxl37RwXBklmTi0C79JfXCEBD1cqqHt0bbgBAGFp81k=
+github.com/shopspring/decimal v1.4.0/go.mod h1:gawqmDU56v4yIKSwfBSFip1HdCCXN8/+DMd9qYNcwME=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=

lib/db/schema/ddl/ddl.go

@@ -50,10 +50,10 @@ type Table struct {
 }
 
 type Column struct {
-	Name       string
-	Nullable   bool
-	PrimaryKey bool
-	//Size          int
+	Name          string
+	Nullable      bool
+	PrimaryKey    bool
+	Size          int
 	Scale         int
 	Precision     int
 	Type          string
@@ -120,6 +120,7 @@ func FromStatement(stmt *gorm.Statement) Table {
 		}
 
 		var datatype = stmt.Dialector.DataTypeOf(field)
+
 		if strings.Contains(datatype, "enum") {
 			datatype = cleanEnum(datatype)
 		} else {
@@ -138,6 +139,7 @@ func FromStatement(stmt *gorm.Statement) Table {
 		var column = Column{
 			Name:          field.DBName,
 			Type:          datatype,
+			Size:          field.Size,
 			Scale:         field.Scale,
 			Precision:     field.Precision,
 			Default:       field.DefaultValue,
@@ -147,6 +149,24 @@ func FromStatement(stmt *gorm.Statement) Table {
 			Unique:        field.Unique,
 		}
 
+		// fix gorm problem with primaryKey
+		if (column.Type == "bigint(20)" || column.Type == "bigint" || column.Type == "int") && field.FieldType.Kind() == reflect.String {
+			column.Type = "varchar"
+		}
+		if column.Type == "varchar" {
+			if column.Size == 0 {
+				column.Size = 255 // default size for VARCHAR is 255, but GORM requires a size > 0 for string fields.
+			}
+			column.Type = "varchar(" + strconv.Itoa(column.Size) + ")"
+		}
+
+		if column.Type == "char" {
+			if column.Size == 0 {
+				column.Size = 255 // default size for VARCHAR is 255, but GORM requires a size > 0 for string fields.
+			}
+			column.Type = "char(" + strconv.Itoa(column.Size) + ")"
+		}
+
 		if v, ok := field.TagSettings["CHARSET"]; ok {
 			column.Charset = v
 		}