Fix Eq, Neq support slice of data

clause/expression.go

@@ -241,7 +241,7 @@ func (eq Eq) Build(builder Builder) {
 			if i > 0 {
 				builder.WriteByte(',')
 			}
-			builder.AddVar(builder, rv.Index(i))
+			builder.AddVar(builder, rv.Index(i).Interface())
 		}
 		builder.WriteByte(')')
 	default:
@@ -272,7 +272,7 @@ func (neq Neq) Build(builder Builder) {
 			if i > 0 {
 				builder.WriteByte(',')
 			}
-			builder.AddVar(builder, rv.Index(i))
+			builder.AddVar(builder, rv.Index(i).Interface())
 		}
 		builder.WriteByte(')')
 	default:

clause/expression_test.go

@@ -105,13 +105,15 @@ func TestNamedExpr(t *testing.T) {
 func TestExpression(t *testing.T) {
 	column := "column-name"
 	results := []struct {
-		Expressions []clause.Expression
-		Result      string
+		Expressions  []clause.Expression
+		ExpectedVars []interface{}
+		Result       string
 	}{{
 		Expressions: []clause.Expression{
 			clause.Eq{Column: column, Value: "column-value"},
 		},
-		Result: "`column-name` = ?",
+		ExpectedVars: []interface{}{"column-value"},
+		Result:       "`column-name` = ?",
 	}, {
 		Expressions: []clause.Expression{
 			clause.Eq{Column: column, Value: nil},
@@ -126,7 +128,8 @@ func TestExpression(t *testing.T) {
 		Expressions: []clause.Expression{
 			clause.Neq{Column: column, Value: "column-value"},
 		},
-		Result: "`column-name` <> ?",
+		ExpectedVars: []interface{}{"column-value"},
+		Result:       "`column-name` <> ?",
 	}, {
 		Expressions: []clause.Expression{
 			clause.Neq{Column: column, Value: nil},
@@ -140,12 +143,14 @@ func TestExpression(t *testing.T) {
 		Expressions: []clause.Expression{
 			clause.Eq{Column: column, Value: []string{"a", "b"}},
 		},
-		Result: "`column-name` IN (?,?)",
+		ExpectedVars: []interface{}{"a", "b"},
+		Result:       "`column-name` IN (?,?)",
 	}, {
 		Expressions: []clause.Expression{
 			clause.Neq{Column: column, Value: []string{"a", "b"}},
 		},
-		Result: "`column-name` NOT IN (?,?)",
+		ExpectedVars: []interface{}{"a", "b"},
+		Result:       "`column-name` NOT IN (?,?)",
 	}}
 
 	for idx, result := range results {
@@ -157,6 +162,10 @@ func TestExpression(t *testing.T) {
 				if stmt.SQL.String() != result.Result {
 					t.Errorf("generated SQL is not equal, expects %v, but got %v", result.Result, stmt.SQL.String())
 				}
+
+				if !reflect.DeepEqual(result.ExpectedVars, stmt.Vars) {
+					t.Errorf("generated vars is not equal, expects %v, but got %v", result.ExpectedVars, stmt.Vars)
+				}
 			})
 		}
 	}