implemented sql flag

README.md

@@ -72,11 +72,9 @@ The generated code is exactly the same as the Stringer tool plus the mentioned a
 The usage of Enumer is the same as Stringer, so you can refer to the [Stringer docs](https://godoc.org/golang.org/x/tools/cmd/stringer)
 for more information.
 
-There is only one flag added: `noJSON`. If this flag is set to true (i.e. `enumer -type=Pill -noJSON`), 
-the JSON related methods won't be generated.
-
-## Additional functions of this fork
-This fork additionally implements the Scanner and Valuer interface to use a enum seamlessly in a database model.
+There are two flags added: `noJSON` and `sql`. If the noJSON flag is set to true (i.e. `enumer -type=Pill -noJSON`), 
+the JSON related methods won't be generated. And if the sql flag is set to true, the Scanner and Valuer interface will 
+be implemented to seamlessly use the enum in a database model.
 
 ## Inspiring projects
 * [Stringer](https://godoc.org/golang.org/x/tools/cmd/stringer)

stringer.go

@@ -83,6 +83,7 @@ import (
 var (
 	typeNames = flag.String("type", "", "comma-separated list of type names; must be set")
 	noJSON    = flag.Bool("noJSON", false, "if true, json marshaling methods will NOT be included. Default: false")
+	sql       = flag.Bool("sql", false, "if true, the Scanner and Valuer interface will be implemented.")
 	output    = flag.String("output", "", "output file name; default srcdir/<type>_string.go")
 )
 
@@ -135,10 +136,12 @@ func main() {
 	g.Printf("\n")
 	g.Printf("import (\n")
 	g.Printf("\t\"fmt\"\n")
-	g.Printf("\t\"database/sql/driver\"\n")
 	if !*noJSON {
 		g.Printf("\t\"encoding/json\"\n")
 	}
+	if *sql {
+		g.Printf("\t\"database/sql/driver\"\n")
+	}
 	g.Printf(")\n")
 
 	// Run generate for each type.
@@ -324,8 +327,10 @@ func (g *Generator) generate(typeName string, includeJSON bool) {
 	}
 
 	// SQL
+	if *sql {
 		g.addValueAndScanMethod(typeName)
 	}
+}
 
 // splitIntoRuns breaks the values into runs of contiguous sequences.
 // For example, given 1,2,3,5,6,7 it returns {1,2,3},{5,6,7}.