Add config for columns with formula

README.md

@@ -19,7 +19,7 @@
 
   ![Unit Test](https://github.com/FreeLeh/GoFreeDB/actions/workflows/unit_test.yml/badge.svg)
   ![Integration Test](https://github.com/FreeLeh/GoFreeDB/actions/workflows/full_test.yml/badge.svg)
-![Coverage](https://img.shields.io/badge/Coverage-82.6%25-brightgreen)
+![Coverage](https://img.shields.io/badge/Coverage-82.8%25-brightgreen)
   [![Go Report Card](https://goreportcard.com/badge/github.com/FreeLeh/GoFreeDB)](https://goreportcard.com/report/github.com/FreeLeh/GoFreeDB)
   [![Go Reference](https://pkg.go.dev/badge/github.com/FreeLeh/GoFreeDB.svg)](https://pkg.go.dev/github.com/FreeLeh/GoFreeDB)
 

internal/common/set.go

@@ -0,0 +1,20 @@
+package common
+
+type Set[T comparable] struct {
+	values map[T]struct{}
+}
+
+func (s *Set[T]) Contains(v T) bool {
+	_, ok := s.values[v]
+	return ok
+}
+
+func NewSet[T comparable](values []T) *Set[T] {
+	s := &Set[T]{
+		values: make(map[T]struct{}, len(values)),
+	}
+	for _, v := range values {
+		s.values[v] = struct{}{}
+	}
+	return s
+}

internal/google/store/row.go

@@ -17,25 +17,30 @@ type GoogleSheetRowStoreConfig struct {
 	// The column ordering will be used for arranging the real columns in Google Sheet.
 	// Changing the column ordering in this config but not in Google Sheet will result in unexpected behaviour.
 	Columns []string
+
+	// ColumnsWithFormula defines the list of column names containing a Google Sheet formula.
+	// Note that only string fields can have a formula.
+	ColumnsWithFormula []string
 }
 
 func (c GoogleSheetRowStoreConfig) validate() error {
 	if len(c.Columns) == 0 {
 		return errors.New("columns must have at least one column")
 	}
 	if len(c.Columns) > maxColumn {
-		return errors.New("you can only have up to 1000 columns")
+		return fmt.Errorf("you can only have up to %d columns", maxColumn)
 	}
 	return nil
 }
 
 // GoogleSheetRowStore encapsulates row store functionality on top of a Google Sheet.
 type GoogleSheetRowStore struct {
-	wrapper       sheetsWrapper
-	spreadsheetID string
-	sheetName     string
-	colsMapping   common.ColsMapping
-	config        GoogleSheetRowStoreConfig
+	wrapper         sheetsWrapper
+	spreadsheetID   string
+	sheetName       string
+	colsMapping     common.ColsMapping
+	colsWithFormula *common.Set[string]
+	config          GoogleSheetRowStoreConfig
 }
 
 // Select specifies which columns to return from the Google Sheet when querying and the output variable
@@ -154,13 +159,13 @@ func NewGoogleSheetRowStore(
 	}
 
 	config = injectTimestampCol(config)
-
 	store := &GoogleSheetRowStore{
-		wrapper:       wrapper,
-		spreadsheetID: spreadsheetID,
-		sheetName:     sheetName,
-		colsMapping:   common.GenerateColumnMapping(config.Columns),
-		config:        config,
+		wrapper:         wrapper,
+		spreadsheetID:   spreadsheetID,
+		sheetName:       sheetName,
+		colsMapping:     common.GenerateColumnMapping(config.Columns),
+		colsWithFormula: common.NewSet(config.ColumnsWithFormula),
+		config:          config,
 	}
 
 	_ = ensureSheets(store.wrapper, store.spreadsheetID, store.sheetName)

internal/google/store/row_test.go

@@ -150,6 +150,62 @@ func TestGoogleSheetRowStore_Integration_EdgeCases(t *testing.T) {
 	assert.NotNil(t, err)
 }
 
+type formulaWriteModel struct {
+	Value string `json:"value" db:"value"`
+}
+
+type formulaReadModel struct {
+	Value int `json:"value" db:"value"`
+}
+
+func TestGoogleSheetRowStore_Formula(t *testing.T) {
+	spreadsheetID, authJSON, shouldRun := getIntegrationTestInfo()
+	if !shouldRun {
+		t.Skip("integration test should be run only in GitHub Actions")
+	}
+	sheetName := fmt.Sprintf("integration_row_%d", common.CurrentTimeMs())
+
+	googleAuth, err := auth.NewServiceFromJSON([]byte(authJSON), auth.GoogleSheetsReadWrite, auth.ServiceConfig{})
+	if err != nil {
+		t.Fatalf("error when instantiating google auth: %s", err)
+	}
+
+	db := NewGoogleSheetRowStore(
+		googleAuth,
+		spreadsheetID,
+		sheetName,
+		GoogleSheetRowStoreConfig{
+			Columns:            []string{"value"},
+			ColumnsWithFormula: []string{"value"},
+		},
+	)
+	defer func() {
+		time.Sleep(time.Second)
+		deleteSheet(t, db.wrapper, spreadsheetID, []string{db.sheetName})
+		_ = db.Close(context.Background())
+	}()
+
+	var out []formulaReadModel
+
+	time.Sleep(time.Second)
+	err = db.Insert(formulaWriteModel{Value: "=ROW()-1"}).Exec(context.Background())
+	assert.Nil(t, err)
+
+	time.Sleep(time.Second)
+	err = db.Select(&out).Exec(context.Background())
+	assert.Nil(t, err)
+	assert.ElementsMatch(t, []formulaReadModel{{Value: 1}}, out)
+
+	time.Sleep(time.Second)
+	err = db.Update(map[string]interface{}{"value": "=ROW()"}).Exec(context.Background())
+	assert.Nil(t, err)
+
+	time.Sleep(time.Second)
+	err = db.Select(&out).Exec(context.Background())
+	assert.Nil(t, err)
+	assert.ElementsMatch(t, []formulaReadModel{{Value: 2}}, out)
+}
+
 func TestInjectTimestampCol(t *testing.T) {
 	result := injectTimestampCol(GoogleSheetRowStoreConfig{Columns: []string{"col1", "col2"}})
 	assert.Equal(t, GoogleSheetRowStoreConfig{Columns: []string{rowIdxCol, "col1", "col2"}}, result)

internal/google/store/stmt.go

@@ -399,10 +399,13 @@ func (s *GoogleSheetInsertStmt) convertRowToSlice(row interface{}) ([]interface{
 	result := make([]interface{}, len(s.store.colsMapping))
 	result[0] = rowIdxFormula
 
-	for key, value := range output {
-		if colIdx, ok := s.store.colsMapping[key]; ok {
-			escapedValue := common.EscapeValue(value)
-			if err := common.CheckIEEE754SafeInteger(escapedValue); err != nil {
+	for col, value := range output {
+		if colIdx, ok := s.store.colsMapping[col]; ok {
+			escapedValue, err := escapeValue(col, value, s.store.colsWithFormula)
+			if err != nil {
+				return nil, err
+			}
+			if err = common.CheckIEEE754SafeInteger(escapedValue); err != nil {
 				return nil, err
 			}
 			result[colIdx.Idx] = escapedValue
@@ -501,8 +504,11 @@ func (s *GoogleSheetUpdateStmt) generateBatchUpdateRequests(rowIndices []int64)
 			return nil, fmt.Errorf("failed to update, unknown column name provided: %s", col)
 		}
 
-		escapedValue := common.EscapeValue(value)
-		if err := common.CheckIEEE754SafeInteger(escapedValue); err != nil {
+		escapedValue, err := escapeValue(col, value, s.store.colsWithFormula)
+		if err != nil {
+			return nil, err
+		}
+		if err = common.CheckIEEE754SafeInteger(escapedValue); err != nil {
 			return nil, err
 		}
 
@@ -657,3 +663,19 @@ func ridWhereClauseInterceptor(where string) string {
 	}
 	return fmt.Sprintf(rowWhereNonEmptyConditionTemplate, where)
 }
+
+func escapeValue(
+	col string,
+	value any,
+	colsWithFormula *common.Set[string],
+) (any, error) {
+	if !colsWithFormula.Contains(col) {
+		return common.EscapeValue(value), nil
+	}
+
+	_, ok := value.(string)
+	if !ok {
+		return nil, fmt.Errorf("value of column %s is not a string, but expected to contain formula", col)
+	}
+	return value, nil
+}