export mermaidJs

README.md

@@ -16,6 +16,8 @@ SQLize is a powerful SQL toolkit for Golang, offering parsing, building, and mig
 - SQL migration generation:
   - Create migrations from Golang models and current SQL schema
   - Generate migration versions compatible with `golang-migrate/migrate`
+  - Export ERD (MermaidJs)
+  - Export Arvo Schema
 
 - Advanced functionalities:
   - Support for embedded structs
@@ -191,6 +193,7 @@ func main() {
 	//ALTER TABLE `user` ADD COLUMN `gender` tinyint(1) AFTER `age`;
 	//DROP INDEX `idx_accept_tnc_at` ON `user`;
 
+	println(newMigration.MermaidJsLive())
 	println(newMigration.ArvoSchema())
 	//...
 

README_zh.md

@@ -117,25 +117,25 @@ CREATE TABLE sample (
 package main
 
 import (
-    "time"
-    
-    "github.com/sunary/sqlize"
+	"time"
+	
+	"github.com/sunary/sqlize"
 )
 
 type user struct {
-    ID          int32  `sql:"primary_key;auto_increment"`
-    Alias       string `sql:"type:VARCHAR(64)"`
-    Name        string `sql:"type:VARCHAR(64);unique;index_columns:name,age"`
-    Age         int
-    Bio         string
-    IgnoreMe    string     `sql:"-"`
-    AcceptTncAt *time.Time `sql:"index:idx_accept_tnc_at"`
-    CreatedAt   time.Time  `sql:"default:CURRENT_TIMESTAMP"`
-    UpdatedAt   time.Time  `sql:"default:CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;index:idx_updated_at"`
+	ID          int32  `sql:"primary_key;auto_increment"`
+	Alias       string `sql:"type:VARCHAR(64)"`
+	Name        string `sql:"type:VARCHAR(64);unique;index_columns:name,age"`
+	Age         int
+	Bio         string
+	IgnoreMe    string     `sql:"-"`
+	AcceptTncAt *time.Time `sql:"index:idx_accept_tnc_at"`
+	CreatedAt   time.Time  `sql:"default:CURRENT_TIMESTAMP"`
+	UpdatedAt   time.Time  `sql:"default:CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;index:idx_updated_at"`
 }
 
 func (user) TableName() string {
-    return "user"
+	return "user"
 }
 
 var createStm = `
@@ -153,48 +153,49 @@ CREATE UNIQUE INDEX idx_name_age ON user(name, age);
 CREATE INDEX idx_updated_at ON user(updated_at);`
 
 func main() {
-    n := time.Now()
-    newMigration := sqlize.NewSqlize(sqlize.WithSqlTag("sql"), sqlize.WithMigrationFolder(""))
-    _ = newMigration.FromObjects(user{AcceptTncAt: &n})
-
-    println(newMigration.StringUp())
-    //CREATE TABLE `user` (
-    //    `id`            int(11) AUTO_INCREMENT PRIMARY KEY,
-    //    `alias`         varchar(64),
-    //    `name`          varchar(64),
-    //    `age`           int(11),
-    //    `bio`           text,
-    //    `accept_tnc_at` datetime NULL,
-    //    `created_at`    datetime DEFAULT CURRENT_TIMESTAMP(),
-    //    `updated_at`    datetime DEFAULT CURRENT_TIMESTAMP() ON UPDATE CURRENT_TIMESTAMP()
-    //);
-    //CREATE UNIQUE INDEX `idx_name_age` ON `user`(`name`, `age`);
-    //CREATE INDEX `idx_accept_tnc_at` ON `user`(`accept_tnc_at`);
-    //CREATE INDEX `idx_updated_at` ON `user`(`updated_at`);
-
-    println(newMigration.StringDown())
-    //DROP TABLE IF EXISTS `user`;
-
-    oldMigration := sqlize.NewSqlize(sqlize.WithMigrationFolder(""))
-    //_ = oldMigration.FromMigrationFolder()
-    _ = oldMigration.FromString(createStm)
-
-    newMigration.Diff(*oldMigration)
-
-    println(newMigration.StringUp())
-    //ALTER TABLE `user` ADD COLUMN `alias` varchar(64) AFTER `id`;
-    //ALTER TABLE `user` DROP COLUMN `gender`;
-    //CREATE INDEX `idx_accept_tnc_at` ON `user`(`accept_tnc_at`);
-
-    println(newMigration.StringDown())
-    //ALTER TABLE `user` DROP COLUMN `alias`;
-    //ALTER TABLE `user` ADD COLUMN `gender` tinyint(1) AFTER `age`;
-    //DROP INDEX `idx_accept_tnc_at` ON `user`;
-
-    println(newMigration.ArvoSchema())
-    //...
-
-    _ = newMigration.WriteFiles("demo migration")
+	n := time.Now()
+	newMigration := sqlize.NewSqlize(sqlize.WithSqlTag("sql"), sqlize.WithMigrationFolder(""))
+	_ = newMigration.FromObjects(user{AcceptTncAt: &n})
+
+	println(newMigration.StringUp())
+	//CREATE TABLE `user` (
+	//	`id`            int(11) AUTO_INCREMENT PRIMARY KEY,
+	//	`alias`         varchar(64),
+	//	`name`          varchar(64),
+	//	`age`           int(11),
+	//	`bio`           text,
+	//	`accept_tnc_at` datetime NULL,
+	//	`created_at`    datetime DEFAULT CURRENT_TIMESTAMP(),
+	//	`updated_at`    datetime DEFAULT CURRENT_TIMESTAMP() ON UPDATE CURRENT_TIMESTAMP()
+	//);
+	//CREATE UNIQUE INDEX `idx_name_age` ON `user`(`name`, `age`);
+	//CREATE INDEX `idx_accept_tnc_at` ON `user`(`accept_tnc_at`);
+	//CREATE INDEX `idx_updated_at` ON `user`(`updated_at`);
+
+	println(newMigration.StringDown())
+	//DROP TABLE IF EXISTS `user`;
+
+	oldMigration := sqlize.NewSqlize(sqlize.WithMigrationFolder(""))
+	//_ = oldMigration.FromMigrationFolder()
+	_ = oldMigration.FromString(createStm)
+
+	newMigration.Diff(*oldMigration)
+
+	println(newMigration.StringUp())
+	//ALTER TABLE `user` ADD COLUMN `alias` varchar(64) AFTER `id`;
+	//ALTER TABLE `user` DROP COLUMN `gender`;
+	//CREATE INDEX `idx_accept_tnc_at` ON `user`(`accept_tnc_at`);
+
+	println(newMigration.StringDown())
+	//ALTER TABLE `user` DROP COLUMN `alias`;
+	//ALTER TABLE `user` ADD COLUMN `gender` tinyint(1) AFTER `age`;
+	//DROP INDEX `idx_accept_tnc_at` ON `user`;
+
+	println(newMigration.MermaidJsLive())
+	println(newMigration.ArvoSchema())
+	//...
+
+	_ = newMigration.WriteFiles("demo migration")
 }
 ```
 

element/column.go

@@ -47,6 +47,25 @@ func (c Column) GetType() byte {
 	return 0
 }
 
+// DataType ...
+func (c Column) DataType() string {
+	return c.typeDefinition(false)
+}
+
+// Constraint ...
+func (c Column) Constraint() string {
+	for _, opt := range c.CurrentAttr.Options {
+		switch opt.Tp {
+		case ast.ColumnOptionPrimaryKey:
+			return "PK"
+		case ast.ColumnOptionReference:
+			return "FK"
+		}
+	}
+
+	return ""
+}
+
 // HasDefaultValue ...
 func (c Column) HasDefaultValue() bool {
 	for _, opt := range c.CurrentAttr.Options {
@@ -60,7 +79,7 @@ func (c Column) HasDefaultValue() bool {
 
 func (c Column) hashValue() string {
 	strHash := sql.EscapeSqlName(c.Name)
-	strHash += c.typeDefinition(false)
+	strHash += " " + c.typeDefinition(false)
 	hash := md5.Sum([]byte(strHash))
 	return hex.EncodeToString(hash[:])
 }
@@ -163,7 +182,7 @@ func (c Column) pkDefinition(isPrev bool) (string, bool) {
 	if isPrev {
 		attr = c.PreviousAttr
 	}
-	strSql := c.typeDefinition(isPrev)
+	strSql := " " + c.typeDefinition(isPrev)
 
 	isPrimaryKey := false
 	for _, opt := range attr.Options {
@@ -185,6 +204,10 @@ func (c Column) pkDefinition(isPrev bool) (string, bool) {
 			continue
 		}
 
+		if opt.Tp == ast.ColumnOptionReference && opt.Refer == nil { // manual add
+			continue
+		}
+
 		_ = opt.Restore(ctx)
 		strSql += " " + b.String()
 	}
@@ -205,11 +228,11 @@ func (c Column) typeDefinition(isPrev bool) string {
 
 	switch {
 	case sql.IsPostgres() && attr.PgType != nil:
-		return " " + attr.PgType.SQLString()
+		return attr.PgType.SQLString()
 	case sql.IsSqlite() && attr.LiteType != nil:
-		return " " + attr.LiteType.Name.Name
+		return attr.LiteType.Name.Name
 	case attr.MysqlType != nil:
-		return " " + attr.MysqlType.String()
+		return attr.MysqlType.String()
 	}
 
 	return "" // column type is empty

element/table.go

@@ -207,10 +207,17 @@ func (t *Table) AddForeignKey(fk ForeignKey) {
 	if id == -1 {
 		t.ForeignKeys = append(t.ForeignKeys, fk)
 		t.indexForeignKeys[fk.Name] = len(t.ForeignKeys) - 1
-		return
+	} else {
+		t.ForeignKeys[id] = fk
 	}
 
-	t.ForeignKeys[id] = fk
+	for i := range t.Columns {
+		if t.Columns[i].Name == fk.Column {
+			t.Columns[i].CurrentAttr.Options = append(t.Columns[i].CurrentAttr.Options, &ast.ColumnOption{
+				Tp: ast.ColumnOptionReference,
+			})
+		}
+	}
 }
 
 // RemoveForeignKey ...

export/mermaidjs/builder.go

@@ -0,0 +1,79 @@
+package mermaidjs
+
+import (
+	"encoding/base64"
+	"fmt"
+	"strings"
+
+	"github.com/sunary/sqlize/element"
+)
+
+const (
+	erdTag              = "erDiagram"
+	liveUrl             = "https://mermaid.ink/img/"
+	defaultRelationType = "}o--||" // n-1
+)
+
+type MermaidJs struct {
+	entities  []string
+	relations []string
+}
+
+func NewMermaidJs(tables []element.Table) *MermaidJs {
+	mm := &MermaidJs{}
+	for i := range tables {
+		mm.AddTable(tables[i])
+	}
+
+	return mm
+}
+
+func (m *MermaidJs) AddTable(table element.Table) {
+	normEntityName := func(s string) string {
+		return strings.ToUpper(s)
+	}
+
+	tab := " "
+	ent := []string{tab + normEntityName(table.Name) + " {"}
+
+	tab = "  "
+	for _, c := range table.Columns {
+		dataType := c.DataType()
+		if strings.HasPrefix(strings.ToLower(dataType), "enum") {
+			dataType = dataType[:4]
+		}
+
+		constraint := c.Constraint()
+
+		cmt := c.CurrentAttr.Comment
+		if cmt != "" {
+			cmt = "\"" + cmt + "\""
+		}
+
+		ent = append(ent, fmt.Sprintf("%s%s %s %s %s", tab, dataType, c.Name, constraint, cmt))
+	}
+
+	tab = " "
+	ent = append(ent, tab+"}")
+	m.entities = append(m.entities, strings.Join(ent, "\n"))
+
+	uniRel := map[string]bool{}
+	for _, rel := range table.ForeignKeys {
+		if _, ok := uniRel[rel.RefTable+"-"+rel.Table]; ok {
+			continue
+		}
+
+		relType := defaultRelationType
+		m.relations = append(m.relations, fmt.Sprintf("%s%s %s %s: %s", tab, normEntityName(rel.Table), relType, normEntityName(rel.RefTable), rel.Column))
+		uniRel[rel.Table+"-"+rel.RefTable] = true
+	}
+}
+
+func (m MermaidJs) String() string {
+	return erdTag + "\n" + strings.Join(m.entities, "\n") + "\n" + strings.Join(m.relations, "\n")
+}
+
+func (m MermaidJs) Live() string {
+	mmParam := base64.URLEncoding.EncodeToString([]byte(m.String()))
+	return liveUrl + string(mmParam)
+}

sqlize.go

@@ -7,7 +7,9 @@ import (
 	"path/filepath"
 
 	_ "github.com/pingcap/parser/test_driver" // driver parser
+	"github.com/sunary/sqlize/element"
 	"github.com/sunary/sqlize/export/avro"
+	"github.com/sunary/sqlize/export/mermaidjs"
 	sql_builder "github.com/sunary/sqlize/sql-builder"
 	sql_parser "github.com/sunary/sqlize/sql-parser"
 	sql_templates "github.com/sunary/sqlize/sql-templates"
@@ -225,19 +227,42 @@ func (s Sqlize) migrationDownVersion(ver int64) string {
 	return fmt.Sprintf(tmp.RollbackMigrationVersion(), s.migrationTable)
 }
 
+func (s Sqlize) selectTable(needTables ...string) []element.Table {
+	tables := make([]element.Table, 0, len(needTables))
+
+	for i := range s.parser.Migration.Tables {
+		if len(needTables) == 0 || utils.ContainStr(needTables, s.parser.Migration.Tables[i].Name) {
+			tables = append(tables, s.parser.Migration.Tables[i])
+		}
+	}
+
+	return tables
+}
+
+// MermaidJsErd export MermaidJs ERD
+func (s Sqlize) MermaidJsErd(needTables ...string) string {
+	mm := mermaidjs.NewMermaidJs(s.selectTable(needTables...))
+	return mm.String()
+}
+
+// MermaidJsLive export MermaidJs Live
+func (s Sqlize) MermaidJsLive(needTables ...string) string {
+	mm := mermaidjs.NewMermaidJs(s.selectTable(needTables...))
+	return mm.Live()
+}
+
 // ArvoSchema export arvo schema, support mysql only
 func (s Sqlize) ArvoSchema(needTables ...string) []string {
 	if s.dialect != sql_templates.MysqlDialect {
 		return nil
 	}
 
-	schemas := make([]string, 0)
-	for i := range s.parser.Migration.Tables {
-		if len(needTables) == 0 || utils.ContainStr(needTables, s.parser.Migration.Tables[i].Name) {
-			record := avro.NewArvoSchema(s.parser.Migration.Tables[i])
-			jsonData, _ := json.Marshal(record)
-			schemas = append(schemas, string(jsonData))
-		}
+	tables := s.selectTable(needTables...)
+	schemas := make([]string, 0, len(tables))
+	for i := range tables {
+		record := avro.NewArvoSchema(tables[i])
+		jsonData, _ := json.Marshal(record)
+		schemas = append(schemas, string(jsonData))
 	}
 
 	return schemas