Work on clauses

callbacks.go

@@ -1,9 +1,11 @@
 package gorm
 
 import (
+	"errors"
 	"fmt"
 
 	"github.com/jinzhu/gorm/logger"
+	"github.com/jinzhu/gorm/schema"
 	"github.com/jinzhu/gorm/utils"
 )
 
@@ -67,6 +69,17 @@ func (cs *callbacks) Raw() *processor {
 }
 
 func (p *processor) Execute(db *DB) {
+	if stmt := db.Statement; stmt != nil && stmt.Dest != nil {
+		var err error
+		stmt.Schema, err = schema.Parse(stmt.Dest, db.cacheStore, db.NamingStrategy)
+
+		if err != nil && !errors.Is(err, schema.ErrUnsupportedDataType) {
+			db.AddError(err)
+		} else if stmt.Table == "" && stmt.Schema != nil {
+			stmt.Table = stmt.Schema.Table
+		}
+	}
+
 	for _, f := range p.fns {
 		f(db)
 	}

callbacks/create.go

@@ -1,6 +1,10 @@
 package callbacks
 
-import "github.com/jinzhu/gorm"
+import (
+	"fmt"
+
+	"github.com/jinzhu/gorm"
+)
 
 func BeforeCreate(db *gorm.DB) {
 	// before save
@@ -13,6 +17,9 @@ func SaveBeforeAssociations(db *gorm.DB) {
 }
 
 func Create(db *gorm.DB) {
+	db.Statement.Build("WITH", "INSERT", "VALUES", "ON_CONFLICT", "RETURNING")
+
+	fmt.Println(db.Statement.SQL.String(), db.Statement.Vars)
 }
 
 func SaveAfterAssociations(db *gorm.DB) {
@@ -22,3 +29,17 @@ func AfterCreate(db *gorm.DB) {
 	// after save
 	// after create
 }
+
+func objectToFieldsMap(stmt *gorm.Statement) {
+	if stmt.Schema != nil {
+		if s, ok := stmt.Clauses["SELECT"]; ok {
+			s.Attrs
+		}
+
+		if s, ok := stmt.Clauses["OMIT"]; ok {
+			s.Attrs
+		}
+
+		stmt.Schema.LookUpField(s.S)
+	}
+}

callbacks/query.go

@@ -0,0 +1,13 @@
+package callbacks
+
+import "github.com/jinzhu/gorm"
+
+func Query(db *gorm.DB) {
+}
+
+func Preload(db *gorm.DB) {
+}
+
+func AfterQuery(db *gorm.DB) {
+	// after find
+}

clause/clause.go

@@ -51,124 +51,21 @@ type OverrideNameInterface interface {
 	OverrideName() string
 }
 
-////////////////////////////////////////////////////////////////////////////////
-// Predefined Clauses
-////////////////////////////////////////////////////////////////////////////////
-
-// Where where clause
-type Where struct {
-	AndConditions AddConditions
-	ORConditions  []ORConditions
-	builders      []Expression
-}
-
-func (where Where) Name() string {
-	return "WHERE"
-}
-
-func (where Where) Build(builder Builder) {
-	var withConditions bool
-
-	if len(where.AndConditions) > 0 {
-		withConditions = true
-		where.AndConditions.Build(builder)
-	}
-
-	if len(where.builders) > 0 {
-		for _, b := range where.builders {
-			if withConditions {
-				builder.Write(" AND ")
-			}
-			withConditions = true
-			b.Build(builder)
-		}
-	}
-
-	var singleOrConditions []ORConditions
-	for _, or := range where.ORConditions {
-		if len(or) == 1 {
-			if withConditions {
-				builder.Write(" OR ")
-				or.Build(builder)
-			} else {
-				singleOrConditions = append(singleOrConditions, or)
-			}
-		} else {
-			withConditions = true
-			builder.Write(" AND (")
-			or.Build(builder)
-			builder.WriteByte(')')
-		}
-	}
-
-	for _, or := range singleOrConditions {
-		if withConditions {
-			builder.Write(" AND ")
-			or.Build(builder)
-		} else {
-			withConditions = true
-			or.Build(builder)
-		}
-	}
-
-	if !withConditions {
-		builder.Write(" FALSE")
-	}
-
-	return
-}
-
-func (where Where) MergeExpression(expr Expression) {
-	if w, ok := expr.(Where); ok {
-		where.AndConditions = append(where.AndConditions, w.AndConditions...)
-		where.ORConditions = append(where.ORConditions, w.ORConditions...)
-		where.builders = append(where.builders, w.builders...)
-	} else {
-		where.builders = append(where.builders, expr)
-	}
-}
-
-// Select select attrs when querying, updating, creating
-type Select struct {
-	Omit bool
-}
-
-// Join join clause
-type Join struct {
-	Table    string
-	Type     string // left join books on
-	ON       []Expression
-	builders []Expression
-}
-
-func (join Join) Build(builder Builder) {
-	// TODO
-}
-
-func (join Join) MergeExpression(expr Expression) {
-	if j, ok := expr.(Join); ok {
-		join.builders = append(join.builders, j.builders...)
-	} else {
-		join.builders = append(join.builders, expr)
-	}
-}
-
-// GroupBy group by clause
-type GroupBy struct {
-}
-
-// Having having clause
-type Having struct {
-}
-
-// Order order clause
-type Order struct {
+// Column quote with name
+type Column struct {
+	Table string
+	Name  string
+	Alias string
+	Raw   bool
 }
 
-// Limit limit clause
-type Limit struct {
+func ToColumns(value ...interface{}) []Column {
+	return nil
 }
 
-// Offset offset clause
-type Offset struct {
+// Table quote with name
+type Table struct {
+	Table string
+	Alias string
+	Raw   bool
 }

clause/from.go

@@ -0,0 +1,22 @@
+package clause
+
+// From from clause
+type From struct {
+	Tables []Table
+}
+
+// Name from clause name
+func (From) Name() string {
+	return "FROM"
+}
+
+// Build build from clause
+func (from From) Build(builder Builder) {
+	for idx, table := range from.Tables {
+		if idx > 0 {
+			builder.WriteByte(',')
+		}
+
+		builder.WriteQuoted(table)
+	}
+}

clause/group_by.go

@@ -0,0 +1,6 @@
+package clause
+
+// GroupBy group by clause
+type GroupBy struct {
+	Having Where
+}

clause/join.go

@@ -0,0 +1,23 @@
+package clause
+
+// Join join clause
+type Join struct {
+	Table From   // From
+	Type  string // INNER, LEFT, RIGHT, FULL, CROSS JOIN
+	Using []Column
+	ON    Where
+}
+
+// TODO multiple joins
+
+func (join Join) Build(builder Builder) {
+	// TODO
+}
+
+func (join Join) MergeExpression(expr Expression) {
+	// if j, ok := expr.(Join); ok {
+	// 	join.builders = append(join.builders, j.builders...)
+	// } else {
+	// 	join.builders = append(join.builders, expr)
+	// }
+}

clause/limit.go

@@ -0,0 +1,6 @@
+package clause
+
+// Limit limit clause
+type Limit struct {
+	Offset uint
+}

clause/order_by.go

@@ -0,0 +1,4 @@
+package clause
+
+type OrderBy struct {
+}

clause/query.go

@@ -2,12 +2,6 @@ package clause
 
 import "strings"
 
-// Column quote with name
-type Column struct {
-	Table string
-	Name  string
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Query Expressions
 ////////////////////////////////////////////////////////////////////////////////

clause/select.go

@@ -0,0 +1,45 @@
+package clause
+
+// Select select attrs when querying, updating, creating
+type Select struct {
+	SelectColumns []Column
+	OmitColumns   []Column
+}
+
+// SelectInterface select clause interface
+type SelectInterface interface {
+	Selects() []Column
+	Omits() []Column
+}
+
+func (s Select) Selects() []Column {
+	return s.SelectColumns
+}
+
+func (s Select) Omits() []Column {
+	return s.OmitColumns
+}
+
+func (s Select) Build(builder Builder) {
+	if len(s.SelectColumns) > 0 {
+		for idx, column := range s.SelectColumns {
+			if idx > 0 {
+				builder.WriteByte(',')
+			}
+			builder.WriteQuoted(column)
+		}
+	} else {
+		builder.WriteByte('*')
+	}
+}
+
+func (s Select) MergeExpression(expr Expression) {
+	if v, ok := expr.(SelectInterface); ok {
+		if len(s.SelectColumns) == 0 {
+			s.SelectColumns = v.Selects()
+		}
+		if len(s.OmitColumns) == 0 {
+			s.OmitColumns = v.Omits()
+		}
+	}
+}

clause/where.go

@@ -0,0 +1,77 @@
+package clause
+
+// Where where clause
+type Where struct {
+	AndConditions AddConditions
+	ORConditions  []ORConditions
+	builders      []Expression
+}
+
+// Name where clause name
+func (where Where) Name() string {
+	return "WHERE"
+}
+
+// Build build where clause
+func (where Where) Build(builder Builder) {
+	var withConditions bool
+
+	if len(where.AndConditions) > 0 {
+		withConditions = true
+		where.AndConditions.Build(builder)
+	}
+
+	if len(where.builders) > 0 {
+		for _, b := range where.builders {
+			if withConditions {
+				builder.Write(" AND ")
+			}
+			withConditions = true
+			b.Build(builder)
+		}
+	}
+
+	var singleOrConditions []ORConditions
+	for _, or := range where.ORConditions {
+		if len(or) == 1 {
+			if withConditions {
+				builder.Write(" OR ")
+				or.Build(builder)
+			} else {
+				singleOrConditions = append(singleOrConditions, or)
+			}
+		} else {
+			withConditions = true
+			builder.Write(" AND (")
+			or.Build(builder)
+			builder.WriteByte(')')
+		}
+	}
+
+	for _, or := range singleOrConditions {
+		if withConditions {
+			builder.Write(" AND ")
+			or.Build(builder)
+		} else {
+			withConditions = true
+			or.Build(builder)
+		}
+	}
+
+	if !withConditions {
+		builder.Write(" FALSE")
+	}
+
+	return
+}
+
+// MergeExpression merge where clauses
+func (where Where) MergeExpression(expr Expression) {
+	if w, ok := expr.(Where); ok {
+		where.AndConditions = append(where.AndConditions, w.AndConditions...)
+		where.ORConditions = append(where.ORConditions, w.ORConditions...)
+		where.builders = append(where.builders, w.builders...)
+	} else {
+		where.builders = append(where.builders, expr)
+	}
+}

clause/with.go

@@ -0,0 +1,4 @@
+package clause
+
+type With struct {
+}

dialects/sqlite/go.mod

@@ -1,7 +1,5 @@
-module github.com/jinzhu/gorm/dialects/mysql
+module github.com/jinzhu/gorm/dialects/sqlite
 
 go 1.13
 
-require (
-	github.com/mattn/go-sqlite3 v2.0.3+incompatible
-)
+require github.com/mattn/go-sqlite3 v2.0.3+incompatible

dialects/sqlite/go.sum

@@ -0,0 +1,2 @@
+github.com/mattn/go-sqlite3 v2.0.3+incompatible h1:gXHsfypPkaMZrKbD5209QV9jbUTJKjyR5WD3HYQSd+U=
+github.com/mattn/go-sqlite3 v2.0.3+incompatible/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=

dialects/sqlite/sqlite.go

@@ -1,6 +1,7 @@
 package sqlite
 
 import (
+	"github.com/jinzhu/gorm"
 	"github.com/jinzhu/gorm/callbacks"
 	_ "github.com/mattn/go-sqlite3"
 )

dialects/sqlite/sqlite_test.go

@@ -1,15 +1,27 @@
 package sqlite_test
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 	"testing"
 
 	"github.com/jinzhu/gorm"
+	"github.com/jinzhu/gorm/dialects/sqlite"
+	"github.com/jinzhu/gorm/tests"
 )
 
-var DB *gorm.DB
+var (
+	DB  *gorm.DB
+	err error
+)
+
+func init() {
+	if DB, err = gorm.Open(sqlite.Open(filepath.Join(os.TempDir(), "gorm.db")), &gorm.Config{}); err != nil {
+		panic(fmt.Sprintf("failed to initialize database, got error %v", err))
+	}
+}
 
-func TestOpen(t *testing.T) {
-	db, err = gorm.Open("sqlite3", filepath.Join(os.TempDir(), "gorm.db"))
+func TestSqlite(t *testing.T) {
+	tests.RunTestsSuit(t, DB)
 }

finisher_api.go

@@ -12,7 +12,9 @@ func (db *DB) Count(sql string, values ...interface{}) (tx *DB) {
 // First find first record that match given conditions, order by primary key
 func (db *DB) First(out interface{}, where ...interface{}) (tx *DB) {
 	tx = db.getInstance()
-	tx.callbacks.Create().Execute(tx.Limit(1).Order("id"))
+	tx.Statement.Dest = out
+	tx.Limit(1)
+	tx.callbacks.Query().Execute(tx)
 	return
 }
 
@@ -35,12 +37,10 @@ func (db *DB) Find(out interface{}, where ...interface{}) (tx *DB) {
 }
 
 func (db *DB) Row() *sql.Row {
-	// TODO
 	return nil
 }
 
 func (db *DB) Rows() (*sql.Rows, error) {
-	// TODO
 	return nil, nil
 }
 

go.mod

@@ -2,4 +2,7 @@ module github.com/jinzhu/gorm
 
 go 1.13
 
-require github.com/jinzhu/inflection v1.0.0
+require (
+	github.com/jinzhu/inflection v1.0.0
+	gopkg.in/errgo.v2 v2.1.0
+)

gorm.go

@@ -2,6 +2,7 @@ package gorm
 
 import (
 	"context"
+	"sync"
 	"time"
 
 	"github.com/jinzhu/gorm/clause"
@@ -12,36 +13,28 @@ import (
 // Config GORM config
 type Config struct {
 	// GORM perform single create, update, delete operations in transactions by default to ensure database data integrity
-	// You can cancel it by setting `SkipDefaultTransaction` to true
-	SkipDefaultTransaction bool // TODO
-
+	// You can disable it by setting `SkipDefaultTransaction` to true
+	SkipDefaultTransaction bool
 	// NamingStrategy tables, columns naming strategy
 	NamingStrategy schema.Namer
-
 	// Logger
 	Logger logger.Interface
-
 	// NowFunc the function to be used when creating a new timestamp
 	NowFunc func() time.Time
 }
 
-// Dialector GORM database dialector
-type Dialector interface {
-	Initialize(*DB) error
-	Migrator() Migrator
-	BindVar(stmt Statement, v interface{}) string
-}
-
 // DB GORM DB definition
 type DB struct {
 	*Config
 	Dialector
 	Instance
-	clone     bool
-	callbacks *callbacks
+	DB         CommonDB
+	clone      bool
+	callbacks  *callbacks
+	cacheStore *sync.Map
 }
 
-// Session session config when create new session
+// Session session config when create session with Session() method
 type Session struct {
 	Context context.Context
 	Logger  logger.Interface
@@ -67,10 +60,11 @@ func Open(dialector Dialector, config *Config) (db *DB, err error) {
 	}
 
 	db = &DB{
-		Config:    config,
-		Dialector: dialector,
-		clone:     true,
-		callbacks: InitializeCallbacks(),
+		Config:     config,
+		Dialector:  dialector,
+		clone:      true,
+		callbacks:  InitializeCallbacks(),
+		cacheStore: &sync.Map{},
 	}
 
 	if dialector != nil {
@@ -113,10 +107,6 @@ func (db *DB) Debug() (tx *DB) {
 	return db.Session(&Session{Logger: db.Logger.LogMode(logger.Info)})
 }
 
-func (db *DB) Close() error {
-	return nil
-}
-
 // Set store value with key into current db instance's context
 func (db *DB) Set(key string, value interface{}) *DB {
 	tx := db.getInstance()
@@ -145,12 +135,15 @@ func (db *DB) getInstance() *DB {
 		}
 
 		return &DB{
-			Config:    db.Config,
-			Dialector: db.Dialector,
 			Instance: Instance{
 				Context:   ctx,
 				Statement: &Statement{DB: db, Clauses: map[string]clause.Clause{}},
 			},
+			Config:     db.Config,
+			Dialector:  db.Dialector,
+			DB:         db.DB,
+			callbacks:  db.callbacks,
+			cacheStore: db.cacheStore,
 		}
 	}
 

interfaces.go

@@ -0,0 +1,21 @@
+package gorm
+
+import (
+	"context"
+	"database/sql"
+)
+
+// Dialector GORM database dialector
+type Dialector interface {
+	Initialize(*DB) error
+	Migrator() Migrator
+	BindVar(stmt Statement, v interface{}) string
+}
+
+// CommonDB common db interface
+type CommonDB interface {
+	ExecContext(ctx context.Context, query string, args ...interface{}) (sql.Result, error)
+	PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
+	QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)
+	QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row
+}

schema/schema.go

@@ -1,6 +1,7 @@
 package schema
 
 import (
+	"errors"
 	"fmt"
 	"go/ast"
 	"reflect"
@@ -9,6 +10,9 @@ import (
 	"github.com/jinzhu/gorm/logger"
 )
 
+// ErrUnsupportedDataType unsupported data type
+var ErrUnsupportedDataType = errors.New("unsupported data type")
+
 type Schema struct {
 	Name                    string
 	ModelType               reflect.Type
@@ -50,9 +54,9 @@ func Parse(dest interface{}, cacheStore *sync.Map, namer Namer) (*Schema, error)
 
 	if modelType.Kind() != reflect.Struct {
 		if modelType.PkgPath() == "" {
-			return nil, fmt.Errorf("unsupported data %+v when parsing model", dest)
+			return nil, fmt.Errorf("%w: %+v", ErrUnsupportedDataType, dest)
 		}
-		return nil, fmt.Errorf("unsupported data type %v when parsing model", modelType.PkgPath())
+		return nil, fmt.Errorf("%w: %v.%v", ErrUnsupportedDataType, modelType.PkgPath(), modelType.Name())
 	}
 
 	if v, ok := cacheStore.Load(modelType); ok {
@@ -88,7 +92,7 @@ func Parse(dest interface{}, cacheStore *sync.Map, namer Namer) (*Schema, error)
 	}
 
 	for _, field := range schema.Fields {
-		if field.DBName == "" {
+		if field.DBName == "" && field.DataType != "" {
 			field.DBName = namer.ColumnName(schema.Table, field.Name)
 		}
 

schema/schema_helper_test.go

@@ -2,24 +2,16 @@ package schema_test
 
 import (
 	"fmt"
-	"reflect"
 	"strings"
 	"testing"
 
 	"github.com/jinzhu/gorm/schema"
+	"github.com/jinzhu/gorm/tests"
 )
 
 func checkSchema(t *testing.T, s *schema.Schema, v schema.Schema, primaryFields []string) {
 	t.Run("CheckSchema/"+s.Name, func(t *testing.T) {
-		equalFieldNames := []string{"Name", "Table"}
-
-		for _, name := range equalFieldNames {
-			got := reflect.ValueOf(s).Elem().FieldByName(name).Interface()
-			expects := reflect.ValueOf(v).FieldByName(name).Interface()
-			if !reflect.DeepEqual(got, expects) {
-				t.Errorf("schema %v %v is not equal, expects: %v, got %v", s, name, expects, got)
-			}
-		}
+		tests.AssertEqual(t, s, v, "Name", "Table")
 
 		for idx, field := range primaryFields {
 			var found bool
@@ -59,15 +51,7 @@ func checkSchemaField(t *testing.T, s *schema.Schema, f *schema.Field, fc func(*
 		if parsedField, ok := s.FieldsByName[f.Name]; !ok {
 			t.Errorf("schema %v failed to look up field with name %v", s, f.Name)
 		} else {
-			equalFieldNames := []string{"Name", "DBName", "BindNames", "DataType", "DBDataType", "PrimaryKey", "AutoIncrement", "Creatable", "Updatable", "HasDefaultValue", "DefaultValue", "NotNull", "Unique", "Comment", "Size", "Precision", "Tag", "TagSettings"}
-
-			for _, name := range equalFieldNames {
-				got := reflect.ValueOf(parsedField).Elem().FieldByName(name).Interface()
-				expects := reflect.ValueOf(f).Elem().FieldByName(name).Interface()
-				if !reflect.DeepEqual(got, expects) {
-					t.Errorf("%v is not equal, expects: %v, got %v", name, expects, got)
-				}
-			}
+			tests.AssertEqual(t, parsedField, f, "Name", "DBName", "BindNames", "DataType", "DBDataType", "PrimaryKey", "AutoIncrement", "Creatable", "Updatable", "HasDefaultValue", "DefaultValue", "NotNull", "Unique", "Comment", "Size", "Precision", "Tag", "TagSettings")
 
 			if field, ok := s.FieldsByDBName[f.DBName]; !ok || parsedField != field {
 				t.Errorf("schema %v failed to look up field with dbname %v", s, f.DBName)

statement.go

@@ -10,6 +10,7 @@ import (
 	"sync"
 
 	"github.com/jinzhu/gorm/clause"
+	"github.com/jinzhu/gorm/schema"
 )
 
 // Instance db instance
@@ -37,6 +38,7 @@ type Statement struct {
 	Clauses  map[string]clause.Clause
 	Settings sync.Map
 	DB       *DB
+	Schema   *schema.Schema
 
 	// SQL Builder
 	SQL       strings.Builder
@@ -69,9 +71,32 @@ func (stmt Statement) WriteQuoted(field interface{}) (err error) {
 }
 
 // Quote returns quoted value
-func (stmt Statement) Quote(field interface{}) (str string) {
-	// FIXME
-	return fmt.Sprint(field)
+func (stmt Statement) Quote(field interface{}) string {
+	var str strings.Builder
+
+	switch v := field.(type) {
+	case clause.Table:
+		str.WriteString(v.Table)
+		if v.Alias != "" {
+			str.WriteString(" AS ")
+			str.WriteString(v.Alias)
+		}
+	case clause.Column:
+		if v.Table != "" {
+			str.WriteString(v.Table)
+			str.WriteByte('.')
+		}
+
+		str.WriteString(v.Name)
+		if v.Alias != "" {
+			str.WriteString(" AS ")
+			str.WriteString(v.Alias)
+		}
+	default:
+		fmt.Sprint(field)
+	}
+
+	return str.String()
 }
 
 // Write write string

tests/create_test.go

@@ -1 +0,0 @@
-package tests

tests/tests.go

@@ -0,0 +1,42 @@
+package tests
+
+import (
+	"testing"
+	"time"
+
+	"github.com/jinzhu/gorm"
+)
+
+func Now() *time.Time {
+	now := time.Now()
+	return &now
+}
+
+func RunTestsSuit(t *testing.T, db *gorm.DB) {
+	TestCreate(t, db)
+}
+
+func TestCreate(t *testing.T, db *gorm.DB) {
+	t.Run("Create", func(t *testing.T) {
+		var user = User{
+			Name:     "create",
+			Age:      18,
+			Birthday: Now(),
+		}
+
+		if err := db.Create(&user).Error; err != nil {
+			t.Errorf("errors happened when create: %v", err)
+		}
+
+		if user.ID == 0 {
+			t.Errorf("user's primary key should has value after create, got : %v", user.ID)
+		}
+
+		var newUser User
+		if err := db.Where("id = ?", user.ID).First(&newUser).Error; err != nil {
+			t.Errorf("errors happened when query: %v", err)
+		} else {
+			AssertEqual(t, newUser, user, "Name", "Age", "Birthday")
+		}
+	})
+}

tests/utils.go

@@ -0,0 +1,19 @@
+package tests
+
+import (
+	"reflect"
+	"testing"
+)
+
+func AssertEqual(t *testing.T, r, e interface{}, names ...string) {
+	for _, name := range names {
+		got := reflect.Indirect(reflect.ValueOf(r)).FieldByName(name).Interface()
+		expects := reflect.Indirect(reflect.ValueOf(e)).FieldByName(name).Interface()
+
+		if !reflect.DeepEqual(got, expects) {
+			t.Run(name, func(t *testing.T) {
+				t.Errorf("expects: %v, got %v", expects, got)
+			})
+		}
+	}
+}