crud: allow any type as Tuple

This is necessary to use a custom types with custom encoders as tuples.

Part of #271

Author: oleg-jukovec

crud/common.go

@@ -59,9 +59,6 @@ import (
 	"github.com/tarantool/go-tarantool"
 )
 
-// Tuple is a type to describe tuple for CRUD methods.
-type Tuple = []interface{}
-
 type baseRequest struct {
 	impl *tarantool.CallRequest
 }

crud/delete.go

@@ -29,7 +29,7 @@ func NewDeleteRequest(space string) *DeleteRequest {
 	req := new(DeleteRequest)
 	req.initImpl("crud.delete")
 	req.setSpace(space)
-	req.key = Tuple{}
+	req.key = []interface{}{}
 	req.opts = DeleteOpts{}
 	return req
 }

crud/get.go

@@ -64,7 +64,7 @@ func NewGetRequest(space string) *GetRequest {
 	req := new(GetRequest)
 	req.initImpl("crud.get")
 	req.setSpace(space)
-	req.key = Tuple{}
+	req.key = []interface{}{}
 	req.opts = GetOpts{}
 	return req
 }

crud/insert.go

@@ -29,7 +29,7 @@ func NewInsertRequest(space string) *InsertRequest {
 	req := new(InsertRequest)
 	req.initImpl("crud.insert")
 	req.setSpace(space)
-	req.tuple = Tuple{}
+	req.tuple = []interface{}{}
 	req.opts = InsertOpts{}
 	return req
 }

crud/replace.go

@@ -29,7 +29,7 @@ func NewReplaceRequest(space string) *ReplaceRequest {
 	req := new(ReplaceRequest)
 	req.initImpl("crud.replace")
 	req.setSpace(space)
-	req.tuple = Tuple{}
+	req.tuple = []interface{}{}
 	req.opts = ReplaceOpts{}
 	return req
 }

crud/tarantool_test.go

@@ -347,7 +347,7 @@ var testGenerateDataCases = []struct {
 func generateTuples() []crud.Tuple {
 	tpls := []crud.Tuple{}
 	for i := 1010; i < 1020; i++ {
-		tpls = append(tpls, crud.Tuple{uint(i), nil, "bla"})
+		tpls = append(tpls, []interface{}{uint(i), nil, "bla"})
 	}
 
 	return tpls

crud/tuple.go

@@ -0,0 +1,5 @@
+package crud
+
+// Tuple is a type to describe tuple for CRUD methods. It can be any type that
+// msgpask can encode.
+type Tuple = interface{}

crud/unflatten_rows.go

@@ -8,20 +8,15 @@ import (
 func UnflattenRows(tuples []interface{}, format []interface{}) ([]MapObject, error) {
 	var (
 		ok        bool
-		tuple     Tuple
 		fieldName string
 		fieldInfo map[interface{}]interface{}
 	)
 
 	objects := []MapObject{}
 
-	for _, rawTuple := range tuples {
+	for _, tuple := range tuples {
 		object := make(map[string]interface{})
-		if tuple, ok = rawTuple.(Tuple); !ok {
-			return nil, fmt.Errorf("Unexpected tuple format: %q", rawTuple)
-		}
-
-		for fieldIdx, field := range tuple {
+		for fieldIdx, field := range tuple.([]interface{}) {
 			if fieldInfo, ok = format[fieldIdx].(map[interface{}]interface{}); !ok {
 				return nil, fmt.Errorf("Unexpected space format: %q", format)
 			}

crud/update.go

@@ -31,7 +31,7 @@ func NewUpdateRequest(space string) *UpdateRequest {
 	req := new(UpdateRequest)
 	req.initImpl("crud.update")
 	req.setSpace(space)
-	req.key = Tuple{}
+	req.key = []interface{}{}
 	req.operations = []Operation{}
 	req.opts = UpdateOpts{}
 	return req

crud/upsert.go

@@ -31,7 +31,7 @@ func NewUpsertRequest(space string) *UpsertRequest {
 	req := new(UpsertRequest)
 	req.initImpl("crud.upsert")
 	req.setSpace(space)
-	req.tuple = Tuple{}
+	req.tuple = []interface{}{}
 	req.operations = []Operation{}
 	req.opts = UpsertOpts{}
 	return req