wip

sqlgen/main.go

@@ -5,14 +5,19 @@ import (
 	"os"
 )
 
+const (
+	DRIVER_SQLITE   = "sqlite"
+	DRIVER_POSTGRES = "postgres"
+)
+
 func Main() {
 	usage := func() {
 		fmt.Fprintf(os.Stderr, `
 %s DRIVER DEFS_PATH OUTPUT_PATH
 
-Drivers are one of: sqlite, postgres
+Drivers are one of: %s %s
 `,
-			os.Args[0])
+			os.Args[0], DRIVER_SQLITE, DRIVER_POSTGRES)
 		os.Exit(1)
 	}
 
@@ -21,21 +26,20 @@ Drivers are one of: sqlite, postgres
 	}
 
 	var (
-		template   string
 		driver     = os.Args[1]
 		defsPath   = os.Args[2]
 		outputPath = os.Args[3]
 	)
 
 	switch driver {
-	case "sqlite":
-		template = sqliteTemplate
+	case DRIVER_SQLITE, DRIVER_POSTGRES:
+		// OK
 	default:
 		fmt.Fprintf(os.Stderr, "Unknown driver: %s", driver)
 		usage()
 	}
 
-	err := render(template, defsPath, outputPath)
+	err := render(driver, defsPath, outputPath)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "Error: %v", err)
 		os.Exit(1)

sqlgen/parse.go

@@ -6,15 +6,15 @@ import (
 	"strings"
 )
 
-func parsePath(filePath string) (*schema, error) {
+func parsePath(driver, filePath string) (*schema, error) {
 	fileBytes, err := os.ReadFile(filePath)
 	if err != nil {
 		return nil, err
 	}
-	return parseBytes(fileBytes)
+	return parseBytes(driver, fileBytes)
 }
 
-func parseBytes(fileBytes []byte) (*schema, error) {
+func parseBytes(driver string, fileBytes []byte) (*schema, error) {
 	s := string(fileBytes)
 	for _, c := range []string{",", "(", ")", ";"} {
 		s = strings.ReplaceAll(s, c, " "+c+" ")
@@ -29,7 +29,7 @@ func parseBytes(fileBytes []byte) (*schema, error) {
 	for len(tokens) > 0 {
 		switch tokens[0] {
 		case "TABLE":
-			tokens, err = parseTable(schema, tokens)
+			tokens, err = parseTable(driver, schema, tokens)
 			if err != nil {
 				return nil, err
 			}
@@ -42,7 +42,7 @@ func parseBytes(fileBytes []byte) (*schema, error) {
 	return schema, nil
 }
 
-func parseTable(schema *schema, tokens []string) ([]string, error) {
+func parseTable(driver string, schema *schema, tokens []string) ([]string, error) {
 	tokens = tokens[1:]
 	if len(tokens) < 3 {
 		return tokens, errors.New("incomplete table definition")
@@ -52,8 +52,9 @@ func parseTable(schema *schema, tokens []string) ([]string, error) {
 	}
 
 	table := &table{
-		Name: tokens[0],
-		Type: tokens[2],
+		driver: driver,
+		Name:   tokens[0],
+		Type:   tokens[2],
 	}
 	schema.Tables = append(schema.Tables, table)
 

sqlgen/parse_test.go

@@ -22,7 +22,7 @@ func TestParse(t *testing.T) {
 
 	for _, defPath := range paths {
 		t.Run(filepath.Base(defPath), func(t *testing.T) {
-			parsed, err := parsePath(defPath)
+			parsed, err := parsePath("", defPath)
 			if err != nil {
 				t.Fatal(err)
 			}

sqlgen/schema.go

@@ -10,6 +10,7 @@ type schema struct {
 }
 
 type table struct {
+	driver   string //
 	Name     string // Name in SQL
 	Type     string // Go type
 	NoInsert bool
@@ -29,6 +30,19 @@ type column struct {
 
 // ----------------------------------------------------------------------------
 
+func (t *table) translateQuery(in string) string {
+	if t.driver == DRIVER_SQLITE {
+		return in
+	}
+
+	i := 1
+	for strings.Contains(in, "?") {
+		in = strings.Replace(in, "?", fmt.Sprintf("$%d", i), 1)
+		i++
+	}
+	return in
+}
+
 func (t *table) colSQLNames() []string {
 	names := make([]string, len(t.Columns))
 	for i := range names {
@@ -72,7 +86,7 @@ func (t *table) InsertQuery() string {
 		b.WriteString(`?`)
 	}
 	b.WriteString(`)`)
-	return b.String()
+	return t.translateQuery(b.String())
 }
 
 func (t *table) InsertArgs() string {
@@ -116,7 +130,7 @@ func (t *table) UpdateQuery() string {
 		b.WriteString(` ` + c.SqlName + `=?`)
 	}
 
-	return b.String()
+	return t.translateQuery(b.String())
 }
 
 func (t *table) UpdateArgs() string {
@@ -166,7 +180,7 @@ func (t *table) UpdateFullQuery() string {
 		b.WriteString(` ` + c.SqlName + `=?`)
 	}
 
-	return b.String()
+	return t.translateQuery(b.String())
 }
 
 func (t *table) UpdateFullArgs() string {
@@ -222,7 +236,7 @@ func (t *table) DeleteQuery() string {
 		b.WriteString(col.SqlName)
 		b.WriteString(`=?`)
 	}
-	return b.String()
+	return t.translateQuery(b.String())
 }
 
 func (t *table) DeleteArgs() string {
@@ -248,7 +262,7 @@ func (t *table) GetQuery() string {
 		}
 		b.WriteString(col.SqlName + `=?`)
 	}
-	return b.String()
+	return t.translateQuery(b.String())
 }
 
 func (t *table) ScanArgs() string {

sqlgen/template.go

@@ -8,16 +8,16 @@ import (
 	"text/template"
 )
 
-//go:embed sqlite.go.tmpl
-var sqliteTemplate string
+//go:embed gen.go.tmpl
+var fileTemplate string
 
-func render(templateStr, schemaPath, outputPath string) error {
-	sch, err := parsePath(schemaPath)
+func render(driver, schemaPath, outputPath string) error {
+	sch, err := parsePath(driver, schemaPath)
 	if err != nil {
 		return err
 	}
 
-	tmpl := template.Must(template.New("").Parse(templateStr))
+	tmpl := template.Must(template.New("").Parse(fileTemplate))
 	fOut, err := os.Create(outputPath)
 	if err != nil {
 		return err