Class: Ask::Ruby::Harness::Tools::QueryDatabase

Inherits:
Ask::Ruby::Harness::Tool show all
Defined in:
lib/ask/ruby/harness/tools/query_database.rb

Constant Summary collapse

WRITE_STATEMENTS = 
/\A\s*(INSERT|UPDATE|DELETE|DROP|TRUNCATE|ALTER|CREATE|GRANT|REVOKE)\b/i
URL_PATTERN = 
%r{\A[a-z][a-z0-9+]*://}

Instance Method Summary collapse

Methods inherited from Ask::Ruby::Harness::Tool

#app_root, #call, session_id, session_id=

Instance Method Details

#execute(sql:, limit: 50, database: nil) ⇒ Object 



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# File 'lib/ask/ruby/harness/tools/query_database.rb', line 23

def execute(sql:, limit: 50, database: nil)
  sql = sql.strip

  if WRITE_STATEMENTS.match?(sql)
    return Ask::Result.failure(
      "Only SELECT queries are allowed. Write statements (#{sql.match(WRITE_STATEMENTS)[1]}) are rejected in all environments."
    )
  end

  if Ask::Ruby::Harness.env == "production" && !sql.match?(/\A\s*SELECT\b/i)
    return Ask::Result.failure(
      "Only SELECT queries are allowed in the production environment."
    )
  end

  pool = resolve_pool(database)
  return pool if pool.is_a?(Ask::Result)

  result = pool.with_connection do |conn|
    limited_sql = sql.match?(/\bLIMIT\b/i) ? sql : "#{sql.chomp(';')} LIMIT #{limit.to_i}"
    query_result = conn.exec_query(limited_sql)
    columns = query_result.columns
    rows = query_result.rows.first(limit.to_i).map { |row| build_row(row, columns) }
    {
      columns: columns,
      rows: rows,
      count: rows.size,
      truncated: query_result.rows.size > limit.to_i
    }
  end
  result.merge(database: resolved_database_name(database))
rescue ActiveRecord::StatementInvalid => e
  Ask::Result.failure("SQL error: #{e.message}")
rescue ActiveRecord::ConnectionNotEstablished => e
  Ask::Result.failure(
    "Database not connected: #{e.message}. Set ASK_DATABASE_URL or provide a config/database.yml."
  )
end