Module: ActiveRecord::ConnectionAdapters::Quoting
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Namespace Children | |
Modules:
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Extension / Inclusion / Inheritance Descendants | |
Included In:
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Class Chain:
self,
::ActiveSupport::Concern
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Defined in: | activerecord/lib/active_record/connection_adapters/abstract/quoting.rb |
Class Method Summary
::ActiveSupport::Concern
- Extended
class_methods | Define class methods from given block. |
included | Evaluate given block in context of base class, so that you can write class macros here. |
prepended | Evaluate given block in context of base class, so that you can write class macros here. |
append_features, prepend_features |
Instance Method Summary
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#quote(value)
Quotes the column value to help prevent SQL injection attacks.
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#quote_column_name(column_name)
Quotes the column name.
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#quote_string(s)
Quotes a string, escaping any ‘ (single quote) and \ (backslash) characters.
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#quote_table_name(table_name)
Quotes the table name.
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#quote_table_name_for_assignment(table, attr)
Override to return the quoted table name for assignment.
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#quoted_date(value)
Quote date/time values for use in SQL input.
- #quoted_false
- #quoted_true
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#type_cast(value)
Cast a
value
to a type that the database understands. - #unquoted_false
- #unquoted_true
- #lookup_cast_type(sql_type) private
- #type_casted_binds(binds) private
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#cast_bound_value(value)
Internal use only
Cast a value to be used as a bound parameter of unknown type.
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#lookup_cast_type_from_column(column)
Internal use only
If you are having to call this function, you are likely doing something wrong.
- #quote_default_expression(value, column) Internal use only
- #quoted_binary(value) Internal use only
- #quoted_time(value) Internal use only
- #sanitize_as_sql_comment(value) Internal use only
Instance Method Details
#cast_bound_value(value)
Cast a value to be used as a bound parameter of unknown type. For example, MySQL
might perform dangerous castings when comparing a string to a number, so this method will cast numbers to string.
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 112
def cast_bound_value(value) # :nodoc: value end
#lookup_cast_type(sql_type) (private)
[ GitHub ]# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 234
def lookup_cast_type(sql_type) type_map.lookup(sql_type) end
#lookup_cast_type_from_column(column)
If you are having to call this function, you are likely doing something wrong. The column does not have sufficient type information if the user provided a custom type on the class level either explicitly (via Attributes::ClassMethods#attribute) or implicitly (via AttributeMethods::Serialization::ClassMethods#serialize, time_zone_aware_attributes
). In almost all cases, the sql type should only be used to change quoting behavior, when the primitive to represent the type doesn’t sufficiently reflect the differences (varchar vs binary) for example. The type used to get this primitive should have been provided before reaching the connection adapter.
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 125
def lookup_cast_type_from_column(column) # :nodoc: lookup_cast_type(column.sql_type) end
#quote(value)
Quotes the column value to help prevent SQL injection attacks.
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 73
def quote(value) case value when String, Symbol, ActiveSupport::Multibyte::Chars "'#{quote_string(value.to_s)}'" when true then quoted_true when false then quoted_false when nil then "NULL" # BigDecimals need to be put in a non-normalized form and quoted. when BigDecimal then value.to_s("F") when Numeric then value.to_s when Type::Binary::Data then quoted_binary(value) when Type::Time::Value then "'#{quoted_time(value)}'" when Date, Time then "'#{quoted_date(value)}'" when Class then "'#{value}'" else raise TypeError, "can't quote #{value.class.name}" end end
#quote_column_name(column_name)
Quotes the column name.
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 136
def quote_column_name(column_name) self.class.quote_column_name(column_name) end
#quote_default_expression(value, column)
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 157
def quote_default_expression(value, column) # :nodoc: if value.is_a?(Proc) value.call else value = lookup_cast_type(column.sql_type).serialize(value) quote(value) end end
#quote_string(s)
Quotes a string, escaping any ‘ (single quote) and \ (backslash) characters.
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 131
def quote_string(s) s.gsub("\\", '\&\&').gsub("'", "''") # ' (for ruby-mode) end
#quote_table_name(table_name)
Quotes the table name.
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 141
def quote_table_name(table_name) self.class.quote_table_name(table_name) end
#quote_table_name_for_assignment(table, attr)
Override to return the quoted table name for assignment. Defaults to table quoting.
This works for MySQL
where table.column can be used to resolve ambiguity.
We override this in the sqlite3 and postgresql adapters to use only the column name (as per syntax requirements).
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 153
def quote_table_name_for_assignment(table, attr) quote_table_name("#{table}.#{attr}") end
#quoted_binary(value)
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 206
def quoted_binary(value) # :nodoc: "'#{quote_string(value.to_s)}'" end
#quoted_date(value)
Quote date/time values for use in SQL input. Includes microseconds if the value is a ::Time
responding to usec.
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 184
def quoted_date(value) if value.acts_like?(:time) if default_timezone == :utc value = value.getutc if !value.utc? else value = value.getlocal end end result = value.to_fs(:db) if value.respond_to?(:usec) && value.usec > 0 result << "." << sprintf("%06d", value.usec) else result end end
#quoted_false
[ GitHub ]# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 174
def quoted_false "FALSE" end
#quoted_time(value)
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 201
def quoted_time(value) # :nodoc: value = value.change(year: 2000, month: 1, day: 1) quoted_date(value).sub(/\A\d\d\d\d-\d\d-\d\d /, "") end
#quoted_true
[ GitHub ]# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 166
def quoted_true "TRUE" end
#sanitize_as_sql_comment(value)
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 210
def sanitize_as_sql_comment(value) # :nodoc: # Sanitize a string to appear within a SQL comment # For compatibility, this also surrounding "/*+", "/*", and "*/" # charcacters, possibly with single surrounding space. # Then follows that by replacing any internal "*/" or "/ *" with # "* /" or "/ *" comment = value.to_s.dup comment.gsub!(%r{\A\s*/\*\+?\s?|\s?\*/\s*\Z}, "") comment.gsub!("*/", "* /") comment.gsub!("/*", "/ *") comment end
#type_cast(value)
# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 94
def type_cast(value) case value when Symbol, ActiveSupport::Multibyte::Chars, Type::Binary::Data value.to_s when true then unquoted_true when false then unquoted_false # BigDecimals need to be put in a non-normalized form and quoted. when BigDecimal then value.to_s("F") when nil, Numeric, String then value when Type::Time::Value then quoted_time(value) when Date, Time then quoted_date(value) else raise TypeError, "can't cast #{value.class.name}" end end
#type_casted_binds(binds) (private)
[ GitHub ]# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 224
def type_casted_binds(binds) binds&.map do |value| if ActiveModel::Attribute === value type_cast(value.value_for_database) else type_cast(value) end end end
#unquoted_false
[ GitHub ]# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 178
def unquoted_false false end
#unquoted_true
[ GitHub ]# File 'activerecord/lib/active_record/connection_adapters/abstract/quoting.rb', line 170
def unquoted_true true end