MySQL generator support.

generator/internal/template/generate.go

@@ -0,0 +1,117 @@
+package template
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/go-jet/jet/generator/internal/metadata"
+	"github.com/go-jet/jet/internal/utils"
+	"path/filepath"
+	"text/template"
+	"time"
+)
+
+func GenerateFiles(destDir string, tables, enums []metadata.MetaData, dialect string) error {
+	if len(tables) == 0 && len(enums) == 0 {
+		return nil
+	}
+
+	fmt.Println("Destination directory:", destDir)
+	fmt.Println("Cleaning up destination directory...")
+	err := utils.CleanUpGeneratedFiles(destDir)
+
+	if err != nil {
+		return err
+	}
+
+	fmt.Println("Generating table sql builder files...")
+	err = generate(destDir, "table", tableSQLBuilderTemplate, tables, dialect)
+
+	if err != nil {
+		return err
+	}
+
+	fmt.Println("Generating table model files...")
+	err = generate(destDir, "model", tableModelTemplate, tables, dialect)
+
+	if err != nil {
+		return err
+	}
+
+	if len(enums) > 0 {
+		fmt.Println("Generating enum sql builder files...")
+		err = generate(destDir, "enum", enumSQLBuilderTemplate, enums, dialect)
+
+		if err != nil {
+			return err
+		}
+
+		fmt.Println("Generating enum model files...")
+		err = generate(destDir, "model", enumModelTemplate, enums, dialect)
+
+		if err != nil {
+			return err
+		}
+	}
+
+	fmt.Println("Done")
+
+	return nil
+
+}
+
+func generate(dirPath, packageName string, template string, metaDataList []metadata.MetaData, dialect string) error {
+	modelDirPath := filepath.Join(dirPath, packageName)
+
+	err := utils.EnsureDirPath(modelDirPath)
+
+	if err != nil {
+		return err
+	}
+
+	autoGenWarning, err := GenerateTemplate(autoGenWarningTemplate, nil, dialect)
+
+	if err != nil {
+		return err
+	}
+
+	for _, metaData := range metaDataList {
+		text, err := GenerateTemplate(template, metaData, dialect)
+
+		if err != nil {
+			return err
+		}
+
+		err = utils.SaveGoFile(modelDirPath, utils.ToGoFileName(metaData.Name()), append(autoGenWarning, text...))
+
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// GenerateTemplate generates template with template text and template data.
+func GenerateTemplate(templateText string, templateData interface{}, dialect string) ([]byte, error) {
+
+	t, err := template.New("sqlBuilderTableTemplate").Funcs(template.FuncMap{
+		"ToGoIdentifier": utils.ToGoIdentifier,
+		"now": func() string {
+			return time.Now().Format(time.RFC850)
+		},
+		"dialect": func() string {
+			return dialect
+		},
+	}).Parse(templateText)
+
+	if err != nil {
+		return nil, err
+	}
+
+	var buf bytes.Buffer
+	if err := t.Execute(&buf, templateData); err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}

generator/internal/template/templates.go

@@ -0,0 +1,140 @@
+package template
+
+var autoGenWarningTemplate = `
+//
+// Code generated by go-jet DO NOT EDIT.
+// Generated at {{now}}
+//
+// WARNING: Changes to this file may cause incorrect behavior  
+// and will be lost if the code is regenerated
+//
+
+`
+
+var tableSQLBuilderTemplate = ` 
+{{define "column-list" -}}
+	{{- range $i, $c := . }}
+		{{- if gt $i 0 }}, {{end}}{{ToGoIdentifier $c.Name}}Column
+	{{- end}}
+{{- end}}
+
+package table
+
+import (
+	"github.com/go-jet/jet"
+	"github.com/go-jet/jet/{{dialect}}"
+)
+
+var {{ToGoIdentifier .Name}} = new{{.GoStructName}}()
+
+type {{.GoStructName}} struct {
+	jet.Table
+	
+	//Columns
+{{- range .Columns}}
+	{{ToGoIdentifier .Name}} {{dialect}}.Column{{.SqlBuilderColumnType}}
+{{- end}}
+
+	AllColumns     jet.ColumnList
+	MutableColumns jet.ColumnList
+}
+
+// creates new {{.GoStructName}} with assigned alias
+func (a *{{.GoStructName}}) AS(alias string) *{{.GoStructName}} {
+	aliasTable := new{{.GoStructName}}()
+
+	aliasTable.Table.AS(alias)
+
+	return aliasTable
+}
+
+func new{{.GoStructName}}() *{{.GoStructName}} {
+	var (
+	{{- range .Columns}}
+		{{ToGoIdentifier .Name}}Column = {{dialect}}.{{.SqlBuilderColumnType}}Column("{{.Name}}")
+	{{- end}}
+	)
+
+	return &{{.GoStructName}}{
+		Table: jet.NewTable("{{.SchemaName}}", "{{.Name}}", {{template "column-list" .Columns}}),
+
+		//Columns
+{{- range .Columns}}
+		{{ToGoIdentifier .Name}}: {{ToGoIdentifier .Name}}Column,
+{{- end}}
+
+		AllColumns:     jet.ColumnList{ {{template "column-list" .Columns}} },
+		MutableColumns: jet.ColumnList{ {{template "column-list" .MutableColumns}} },
+	}
+}
+
+`
+
+var tableModelTemplate = `package model
+
+{{ if .GetImports }}
+import (
+{{- range .GetImports}}
+	"{{.}}"
+{{- end}}
+)
+{{end}}
+
+
+type {{ToGoIdentifier .Name}} struct {
+{{- range .Columns}}
+	{{ToGoIdentifier .Name}} {{.GoModelType}} ` + "{{.GoModelTag ($.IsPrimaryKey .Name)}}" + `
+{{- end}}
+}
+
+
+`
+var enumSQLBuilderTemplate = `package enum
+
+import "github.com/go-jet/jet"
+
+var {{ToGoIdentifier $.Name}} = &struct {
+{{- range $index, $element := .Values}}
+	{{ToGoIdentifier $element}} jet.StringExpression
+{{- end}}
+} {
+{{- range $index, $element := .Values}}
+	{{ToGoIdentifier $element}}: jet.NewEnumValue("{{$element}}"),
+{{- end}}
+}
+`
+
+var enumModelTemplate = `package model
+
+import "errors"
+
+type {{ToGoIdentifier $.Name}} string
+
+const (
+{{- range $index, $element := .Values}}
+	{{ToGoIdentifier $.Name}}_{{ToGoIdentifier $element}} {{ToGoIdentifier $.Name}} = "{{$element}}"
+{{- end}}
+)
+
+func (e *{{ToGoIdentifier $.Name}}) Scan(value interface{}) error {
+	if v, ok := value.(string); !ok {
+		return errors.New("jet: Invalid data for {{ToGoIdentifier $.Name}} enum")
+	} else {
+		switch string(v) {
+{{- range $index, $element := .Values}}
+		case "{{$element}}":
+			*e = {{ToGoIdentifier $.Name}}_{{ToGoIdentifier $element}}
+{{- end}}
+		default:
+			return errors.New("jet: Inavlid data " + string(v) + "for {{ToGoIdentifier $.Name}} enum")
+		}
+
+		return nil
+	}
+}
+
+func (e {{ToGoIdentifier $.Name}}) String() string {
+	return string(e)
+}
+
+`