func AllTopics(limit int64, offset int64) ([]Topic, error) {
// Query DB
database := db.Get()
rows, err := database.Query("SELECT * FROM topics ORDER BY created_at LIMIT $1 OFFSET $2", limit, offset)
if err != nil {
return nil, err
}
defer rows.Close()
// Converting rows into []Topic
var topics []Topic = []Topic{}
for rows.Next() {
t := new(Topic)
err = t.consumeNextRow(rows)
if err != nil {
return nil, err
}
topics = append(topics, *t)
}
// Checking for any errors during iteration
err = rows.Err()
if err != nil {
return nil, err
}
return topics, nil
}
func (t *Topic) Delete() error {
// Deleting from database
database := db.Get()
res, err := database.Exec("DELETE FROM topics WHERE id=$1", t.Id)
if err != nil {
return err
}
numRows, _ := res.RowsAffected()
if numRows != 1 {
return errors.New("Nothing was deleted")
}
return nil
}
func (t *Topic) Save() error {
// Putting into database
database := db.Get()
row := database.QueryRow("INSERT INTO topics VALUES(default, $1, default, default) RETURNING *",
&t.Name,
)
// Updating values to match database
err := t.consumeRow(row)
if err != nil {
return err
}
return nil
}
func (t *Topic) Update() error {
// Updating in database
database := db.Get()
row := database.QueryRow("UPDATE topics SET name=$1 WHERE id=$2 RETURNING *",
&t.Name,
&t.Id,
)
// Updating values to match database
err := t.consumeRow(row)
if err != nil {
return err
}
return nil
}
func (t *Topic) Load(id int64) error {
database := db.Get()
row := database.QueryRow("SELECT * FROM topics WHERE id = $1", id)
return t.consumeRow(row)
}