func GetChainBlocks(docID int, blockID int) ([]Block, error){
    db, err := sql.Open("postgres", "user=roman password=1234512345" +
        " dbname=docnota host=192.168.88.221 sslmode=disable")
    if err != nil{
        return nil, err
    }

    query := "WITH RECURSIVE get_all_parents(id, parent_id, level, content, name) AS( " +
    "SELECT block.id, db.parent_block, 0, block.content, block.name " +
    "FROM block JOIN doc_block db ON block.id = db.block_id " +
    "WHERE db.doc_id = $1 AND block.id = $2 " +
    "UNION ALL " +
    "SELECT block.id, db.parent_block, level+1, block.content, block.name " +
    "FROM block JOIN doc_block db ON block.id = db.block_id " +
    "JOIN get_all_parents gap ON gap.parent_id = db.block_id " +
    ") SELECT name, content, parent_id FROM get_all_parents ORDER BY id "
    rows, err := db.Query(query, docID, blockID)
    if err != nil{
        return nil, err
    }
    defer rows.Close()
    blocks := make([]Block, 0)
    for rows.Next(){
        block := new(Block)
        err = rows.Scan(&block.Name, &block.Text, &block.Parent)
        if err != nil{
            return nil, err
        }
        blocks = append(blocks, *block)
    }
    err = rows.Err()
    if err != nil{
        return nil, err
    }
    return blocks, nil
}