MM-30300: Add coalesce to get null content as empty string on FileInfo store (#16216)

* MM-30300: Add coalesce to get null content as empty string on FileInfo store

* Making explicit the fields get from the FileInfo table

* Addressing PR review comments

store/sqlstore/file_info_store.go

@@ -17,7 +17,8 @@ import (
 
 type SqlFileInfoStore struct {
 	SqlStore
-	metrics einterfaces.MetricsInterface
+	metrics     einterfaces.MetricsInterface
+	queryFields []string
 }
 
 func (fs SqlFileInfoStore) ClearCaches() {
@@ -29,6 +30,27 @@ func newSqlFileInfoStore(sqlStore SqlStore, metrics einterfaces.MetricsInterface
 		metrics:  metrics,
 	}
 
+	s.queryFields = []string{
+		"FileInfo.Id",
+		"FileInfo.CreatorId",
+		"FileInfo.PostId",
+		"FileInfo.CreateAt",
+		"FileInfo.UpdateAt",
+		"FileInfo.DeleteAt",
+		"FileInfo.Path",
+		"FileInfo.ThumbnailPath",
+		"FileInfo.PreviewPath",
+		"FileInfo.Name",
+		"FileInfo.Extension",
+		"FileInfo.Size",
+		"FileInfo.MimeType",
+		"FileInfo.Width",
+		"FileInfo.Height",
+		"FileInfo.HasPreviewImage",
+		"FileInfo.MiniPreview",
+		"Coalesce(FileInfo.Content, '') AS Content",
+	}
+
 	for _, db := range sqlStore.GetAllConns() {
 		table := db.AddTableWithName(model.FileInfo{}, "FileInfo").SetKeys(false, "Id")
 		table.ColMap("Id").SetMaxSize(26)
@@ -86,14 +108,18 @@ func (fs SqlFileInfoStore) Upsert(info *model.FileInfo) (*model.FileInfo, error)
 func (fs SqlFileInfoStore) Get(id string) (*model.FileInfo, error) {
 	info := &model.FileInfo{}
 
-	if err := fs.GetReplica().SelectOne(info,
-		`SELECT
-			*
-		FROM
-			FileInfo
-		WHERE
-			Id = :Id
-			AND DeleteAt = 0`, map[string]interface{}{"Id": id}); err != nil {
+	query := fs.getQueryBuilder().
+		Select(fs.queryFields...).
+		From("FileInfo").
+		Where(sq.Eq{"Id": id}).
+		Where(sq.Eq{"DeleteAt": 0})
+
+	queryString, args, err := query.ToSql()
+	if err != nil {
+		return nil, errors.Wrap(err, "file_info_tosql")
+	}
+
+	if err := fs.GetReplica().SelectOne(info, queryString, args...); err != nil {
 		if err == sql.ErrNoRows {
 			return nil, store.NewErrNotFound("FileInfo", id)
 		}
@@ -117,7 +143,7 @@ func (fs SqlFileInfoStore) GetWithOptions(page, perPage int, opt *model.GetFileI
 	}
 
 	query := fs.getQueryBuilder().
-		Select("FileInfo.*").
+		Select(fs.queryFields...).
 		From("FileInfo")
 
 	if len(opt.ChannelIds) > 0 {
@@ -172,15 +198,19 @@ func (fs SqlFileInfoStore) GetWithOptions(page, perPage int, opt *model.GetFileI
 func (fs SqlFileInfoStore) GetByPath(path string) (*model.FileInfo, error) {
 	info := &model.FileInfo{}
 
-	if err := fs.GetReplica().SelectOne(info,
-		`SELECT
-				*
-			FROM
-				FileInfo
-			WHERE
-				Path = :Path
-				AND DeleteAt = 0
-			LIMIT 1`, map[string]interface{}{"Path": path}); err != nil {
+	query := fs.getQueryBuilder().
+		Select(fs.queryFields...).
+		From("FileInfo").
+		Where(sq.Eq{"Path": path}).
+		Where(sq.Eq{"DeleteAt": 0}).
+		Limit(1)
+
+	queryString, args, err := query.ToSql()
+	if err != nil {
+		return nil, errors.Wrap(err, "file_info_tosql")
+	}
+
+	if err := fs.GetReplica().SelectOne(info, queryString, args...); err != nil {
 		if err == sql.ErrNoRows {
 			return nil, store.NewErrNotFound("FileInfo", fmt.Sprintf("path=%s", path))
 		}
@@ -203,7 +233,7 @@ func (fs SqlFileInfoStore) GetForPost(postId string, readFromMaster, includeDele
 	}
 
 	query := fs.getQueryBuilder().
-		Select("*").
+		Select(fs.queryFields...).
 		From("FileInfo").
 		Where(sq.Eq{"PostId": postId}).
 		OrderBy("CreateAt")
@@ -228,16 +258,19 @@ func (fs SqlFileInfoStore) GetForUser(userId string) ([]*model.FileInfo, error)
 
 	dbmap := fs.GetReplica()
 
-	if _, err := dbmap.Select(&infos,
-		`SELECT
-				*
-			FROM
-				FileInfo
-			WHERE
-				CreatorId = :CreatorId
-				AND DeleteAt = 0
-			ORDER BY
-				CreateAt`, map[string]interface{}{"CreatorId": userId}); err != nil {
+	query := fs.getQueryBuilder().
+		Select(fs.queryFields...).
+		From("FileInfo").
+		Where(sq.Eq{"CreatorId": userId}).
+		Where(sq.Eq{"DeleteAt": 0}).
+		OrderBy("CreateAt")
+
+	queryString, args, err := query.ToSql()
+	if err != nil {
+		return nil, errors.Wrap(err, "file_info_tosql")
+	}
+
+	if _, err := dbmap.Select(&infos, queryString, args...); err != nil {
 		return nil, errors.Wrapf(err, "failed to find FileInfos with creatorId=%s", userId)
 	}
 	return infos, nil