Module: ActiveRecord::Sanitization::ClassMethods

# File 'activerecord/lib/active_record/sanitization.rb', line 233

def quote_bound_value(connection, value)
  if value.respond_to?(:map) && !value.acts_like?(:string)
    values = value.map { |v| v.respond_to?(:id_for_database) ? v.id_for_database : v }
    if values.empty?
      connection.quote(connection.cast_bound_value(nil))
    else
      values.map! { |v| connection.quote(connection.cast_bound_value(v)) }.join(",")
    end
  else
    value = value.id_for_database if value.respond_to?(:id_for_database)
    connection.quote(connection.cast_bound_value(value))
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 247

def raise_if_bind_arity_mismatch(statement, expected, provided)
  unless expected == provided
    raise PreparedStatementInvalid, "wrong number of bind variables (#{provided} for #{expected}) in: #{statement}"
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 211

def replace_bind_variable(connection, value)
  if ActiveRecord::Relation === value
    value.to_sql
  else
    quote_bound_value(connection, value)
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 203

def replace_bind_variables(connection, statement, values)
  raise_if_bind_arity_mismatch(statement, statement.count("?"), values.size)
  bound = values.dup
  statement.gsub(/\?/) do
    replace_bind_variable(connection, bound.shift)
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 219

def replace_named_bind_variables(connection, statement, bind_vars)
  statement.gsub(/([:\\]?):([a-zA-Z]\w*)/) do |match|
    if $1 == ":" # skip PostgreSQL casts
      match # return the whole match
    elsif $1 == "\\" # escaped literal colon
      match[1..-1] # return match with escaping backlash char removed
    elsif bind_vars.include?(match = $2.to_sym)
      replace_bind_variable(connection, bind_vars[match])
    else
      raise PreparedStatementInvalid, "missing value for :#{match} in #{statement}"
    end
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 41

alias :sanitize_sql :sanitize_sql_for_conditions

# File 'activerecord/lib/active_record/sanitization.rb', line 164

def sanitize_sql_array(ary)
  statement, *values = ary
  if values.first.is_a?(Hash) && /:\w+/.match?(statement)
    with_connection do |c|
      replace_named_bind_variables(c, statement, values.first)
    end
  elsif statement.include?("?")
    with_connection do |c|
      replace_bind_variables(c, statement, values)
    end
  elsif statement.blank?
    statement
  else
    with_connection do |c|
      statement % values.collect { |value| c.quote_string(value.to_s) }
    end
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 68

def sanitize_sql_for_assignment(assignments, default_table_name = table_name)
  case assignments
  when Array; sanitize_sql_array(assignments)
  when Hash;  sanitize_sql_hash_for_assignment(assignments, default_table_name)
  else        assignments
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 33

def sanitize_sql_for_conditions(condition)
  return nil if condition.blank?

  case condition
  when Array; sanitize_sql_array(condition)
  else        condition
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 84

def sanitize_sql_for_order(condition)
  if condition.is_a?(Array) && condition.first.to_s.include?("?")
    disallow_raw_sql!(
      [condition.first],
      permit: adapter_class.column_name_with_order_matcher
    )

    # Ensure we aren't dealing with a subclass of String that might
    # override methods we use (e.g. Arel::Nodes::SqlLiteral).
    if condition.first.kind_of?(String) && !condition.first.instance_of?(String)
      condition = [String.new(condition.first), *condition[1..-1]]
    end

    Arel.sql(sanitize_sql_array(condition))
  else
    condition
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 107

def sanitize_sql_hash_for_assignment(attrs, table)
  with_connection do |c|
    attrs.map do |attr, value|
      type = type_for_attribute(attr)
      value = type.serialize(type.cast(value))
      "#{c.quote_table_name_for_assignment(table, attr)} = #{c.quote(value)}"
    end.join(", ")
  end
end

# File 'activerecord/lib/active_record/sanitization.rb', line 132

def sanitize_sql_like(string, escape_character = "\")
  if string.include?(escape_character) && escape_character != "%" && escape_character != "_"
    string = string.gsub(escape_character, '\0\0')
  end

  string.gsub(/(?=[%_])/, escape_character)
end