Class: Ask::Rails::Harness::Tools::QueryDatabase

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

Constant Summary collapse

WRITE_STATEMENTS = 
/\A\s*(INSERT|UPDATE|DELETE|DROP|TRUNCATE|ALTER|CREATE|GRANT|REVOKE)\b/i

Instance Method Summary collapse

Methods inherited from Ask::Rails::Harness::Tool

#call, #rails_root, session_id, session_id=

Instance Method Details

#execute(sql:, limit: 50) ⇒ Object 



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# File 'lib/ask/rails/harness/tools/query_database.rb', line 16

def execute(sql:, limit: 50)
  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 ::Rails.env.production? && !sql.match?(/\A\s*SELECT\b/i)
    return Ask::Result.failure(
      "Only SELECT queries are allowed in the production environment."
    )
  end

  pool = ActiveRecord::Base.connection_pool
  pool.with_connection do |conn|
    limited_sql = sql.match?(/\bLIMIT\b/i) ? sql : "#{sql.chomp(';')} LIMIT #{limit.to_i}"
    result = conn.exec_query(limited_sql)
    columns = result.columns
    rows = result.rows.first(limit.to_i).map { |row| build_row(row, columns) }
    {
      columns: columns,
      rows: rows,
      count: rows.size,
      truncated: result.rows.size > limit.to_i
    }
  end
rescue ActiveRecord::StatementInvalid => e
  Ask::Result.failure("SQL error: #{e.message}")
rescue ActiveRecord::ConnectionNotEstablished => e
  Ask::Result.failure("Database not connected: #{e.message}. Verify the database is running and Rails is connected.")
end