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module ActiveRecord
module ConnectionAdapters
module PostgreSQL
module Quoting
# Escapes binary strings for bytea input to the database.
def escape_bytea(value)
@connection.escape_bytea(value) if value
end
# Unescapes bytea output from a database to the binary string it represents.
# NOTE: This is NOT an inverse of escape_bytea! This is only to be used
# on escaped binary output from database drive.
def unescape_bytea(value)
@connection.unescape_bytea(value) if value
end
# Quotes strings for use in SQL input.
def quote_string(s) #:nodoc:
@connection.escape(s)
end
# Checks the following cases:
#
# - table_name
# - "table.name"
# - schema_name.table_name
# - schema_name."table.name"
# - "schema.name".table_name
# - "schema.name"."table.name"
def quote_table_name(name)
Utils.extract_schema_qualified_name(name.to_s).quoted
end
def quote_table_name_for_assignment(table, attr)
quote_column_name(attr)
end
# Quotes column names for use in SQL queries.
def quote_column_name(name) #:nodoc:
PGconn.quote_ident(name.to_s)
end
# Quote date/time values for use in SQL input. Includes microseconds
# if the value is a Time responding to usec.
def quoted_date(value) #:nodoc:
if value.year <= 0
bce_year = format("%04d", -value.year + 1)
super.sub(/^-?\d+/, bce_year) + " BC"
else
super
end
end
# Does not quote function default values for UUID columns
def quote_default_value(value, column) #:nodoc:
if column.type == :uuid && value =~ /\(\)/
value
else
value = type_cast_from_column(column, value)
quote(value)
end
end
def lookup_cast_type_from_column(column) # :nodoc:
type_map.lookup(column.oid, column.fmod, column.sql_type)
end
def type_for_attribute_options(
type_name,
array: false,
range: false,
**options
)
if array
subtype = type_for_attribute_options(type_name, **options)
OID::Array.new(subtype)
elsif range
subtype = type_for_attribute_options(type_name, **options)
OID::Range.new(subtype)
else
super(type_name, **options)
end
end
private
def _quote(value)
case value
when Type::Binary::Data
"'#{escape_bytea(value.to_s)}'"
when OID::Xml::Data
"xml '#{quote_string(value.to_s)}'"
when OID::Bit::Data
if value.binary?
"B'#{value}'"
elsif value.hex?
"X'#{value}'"
end
when Float
if value.infinite? || value.nan?
"'#{value}'"
else
super
end
else
super
end
end
def _type_cast(value)
case value
when Type::Binary::Data
# Return a bind param hash with format as binary.
# See http://deveiate.org/code/pg/PGconn.html#method-i-exec_prepared-doc
# for more information
{ value: value.to_s, format: 1 }
when OID::Xml::Data, OID::Bit::Data
value.to_s
else
super
end
end
def type_classes_with_standard_constructor
super.merge(
bit: OID::Bit,
bit_varying: OID::BitVarying,
binary: OID::Bytea,
cidr: OID::Cidr,
date_time: OID::DateTime,
decimal: OID::Decimal,
enum: OID::Enum,
hstore: OID::Hstore,
inet: OID::Inet,
json: OID::Json,
jsonb: OID::Jsonb,
money: OID::Money,
point: OID::Point,
uuid: OID::Uuid,
vector: OID::Vector,
xml: OID::Xml,
)
end
end
end
end
end
|
