Module: Sequel
- Extended by:
- NamedTimezones, ThreadLocalTimezones, Timezones
- Includes:
- SQL::Constants
- Defined in:
- lib/sequel/core.rb,
lib/sequel/sql.rb,
lib/sequel/model.rb,
lib/sequel/dataset.rb,
lib/sequel/version.rb,
lib/sequel/database.rb,
lib/sequel/timezones.rb,
lib/sequel/exceptions.rb,
lib/sequel/model/base.rb,
lib/sequel/adapters/do.rb,
lib/sequel/dataset/sql.rb,
lib/sequel/adapters/ado.rb,
lib/sequel/adapters/db2.rb,
lib/sequel/adapters/dbi.rb,
lib/sequel/dataset/misc.rb,
lib/sequel/model/errors.rb,
lib/sequel/adapters/jdbc.rb,
lib/sequel/adapters/odbc.rb,
lib/sequel/database/misc.rb,
lib/sequel/dataset/graph.rb,
lib/sequel/dataset/query.rb,
lib/sequel/model/plugins.rb,
lib/sequel/plugins/touch.rb,
lib/sequel/adapters/mysql.rb,
lib/sequel/database/query.rb,
lib/sequel/plugins/schema.rb,
lib/sequel/adapters/oracle.rb,
lib/sequel/adapters/sqlite.rb,
lib/sequel/dataset/actions.rb,
lib/sequel/metaprogramming.rb,
lib/sequel/plugins/caching.rb,
lib/sequel/adapters/jdbc/h2.rb,
lib/sequel/database/dataset.rb,
lib/sequel/database/logging.rb,
lib/sequel/dataset/features.rb,
lib/sequel/dataset/mutation.rb,
lib/sequel/extensions/query.rb,
lib/sequel/model/exceptions.rb,
lib/sequel/plugins/sharding.rb,
lib/sequel/adapters/do/mysql.rb,
lib/sequel/adapters/firebird.rb,
lib/sequel/adapters/informix.rb,
lib/sequel/adapters/openbase.rb,
lib/sequel/adapters/postgres.rb,
lib/sequel/model/inflections.rb,
lib/sequel/plugins/rcte_tree.rb,
lib/sequel/adapters/ado/mssql.rb,
lib/sequel/adapters/do/sqlite.rb,
lib/sequel/model/associations.rb,
lib/sequel/plugins/subclasses.rb,
lib/sequel/plugins/timestamps.rb,
lib/sequel/adapters/amalgalite.rb,
lib/sequel/adapters/jdbc/as400.rb,
lib/sequel/adapters/jdbc/mssql.rb,
lib/sequel/adapters/jdbc/mysql.rb,
lib/sequel/adapters/odbc/mssql.rb,
lib/sequel/database/connecting.rb,
lib/sequel/extensions/sql_expr.rb,
lib/sequel/plugins/composition.rb,
lib/sequel/adapters/do/postgres.rb,
lib/sequel/adapters/jdbc/oracle.rb,
lib/sequel/adapters/jdbc/sqlite.rb,
lib/sequel/extensions/migration.rb,
lib/sequel/plugins/active_model.rb,
lib/sequel/plugins/identity_map.rb,
lib/sequel/adapters/shared/mssql.rb,
lib/sequel/adapters/shared/mysql.rb,
lib/sequel/extensions/pagination.rb,
lib/sequel/plugins/serialization.rb,
lib/sequel/adapters/shared/oracle.rb,
lib/sequel/adapters/shared/sqlite.rb,
lib/sequel/plugins/force_encoding.rb,
lib/sequel/plugins/instance_hooks.rb,
lib/sequel/database/schema_methods.rb,
lib/sequel/extensions/pretty_table.rb,
lib/sequel/plugins/association_pks.rb,
lib/sequel/plugins/boolean_readers.rb,
lib/sequel/plugins/lazy_attributes.rb,
lib/sequel/plugins/string_stripper.rb,
lib/sequel/adapters/jdbc/postgresql.rb,
lib/sequel/adapters/shared/postgres.rb,
lib/sequel/adapters/shared/progress.rb,
lib/sequel/extensions/schema_dumper.rb,
lib/sequel/plugins/instance_filters.rb,
lib/sequel/plugins/typecast_on_load.rb,
lib/sequel/database/dataset_defaults.rb,
lib/sequel/database/schema_generator.rb,
lib/sequel/model/default_inflections.rb,
lib/sequel/plugins/many_through_many.rb,
lib/sequel/plugins/nested_attributes.rb,
lib/sequel/extensions/named_timezones.rb,
lib/sequel/plugins/hook_class_methods.rb,
lib/sequel/plugins/optimistic_locking.rb,
lib/sequel/plugins/update_primary_key.rb,
lib/sequel/plugins/validation_helpers.rb,
lib/sequel/dataset/prepared_statements.rb,
lib/sequel/plugins/association_proxies.rb,
lib/sequel/plugins/skip_create_refresh.rb,
lib/sequel/extensions/looser_typecasting.rb,
lib/sequel/plugins/tactical_eager_loading.rb,
lib/sequel/plugins/class_table_inheritance.rb,
lib/sequel/adapters/utils/stored_procedures.rb,
lib/sequel/plugins/association_dependencies.rb,
lib/sequel/plugins/single_table_inheritance.rb,
lib/sequel/plugins/validation_class_methods.rb,
lib/sequel/extensions/thread_local_timezones.rb
Overview
The thread_local_timezones extension allows you to set a per-thread timezone that will override the default global timezone while the thread is executing. The main use case is for web applications that execute each request in its own thread, and want to set the timezones based on the request. The most common example is having the database always store time in UTC, but have the application deal with the timezone of the current user. That can be done with:
Sequel.database_timezone = :utc
# In each thread:
Sequel.thread_application_timezone = current_user.timezone
This extension is designed to work with the named_timezones extension.
This extension adds the thread_application_timezone=, thread_database_timezone=, and thread_typecast_timezone= methods to the Sequel module. It overrides the application_timezone, database_timezone, and typecast_timezone methods to check the related thread local timezone first, and use it if present. If the related thread local timezone is not present, it falls back to the default global timezone.
There is one special case of note. If you have a default global timezone and you want to have a nil thread local timezone, you have to set the thread local value to :nil instead of nil:
Sequel.application_timezone = :utc
Sequel.thread_application_timezone = nil
Sequel.application_timezone # => :utc
Sequel.thread_application_timezone = :nil
Sequel.application_timezone # => nil
Defined Under Namespace
Modules: ADO, Amalgalite, DB2, DBI, DataObjects, Firebird, Inflections, Informix, JDBC, LooserTypecasting, MSSQL, Metaprogramming, MySQL, NamedTimezones, ODBC, OpenBase, Oracle, Plugins, Postgres, PrettyTable, Progress, SQL, SQLite, Schema, ThreadLocalTimezones, Timezones Classes: AdapterNotFound, BasicObject, BeforeHookFailed, ConnectionPool, Database, DatabaseConnectionError, DatabaseDisconnectError, DatabaseError, Dataset, Error, IntegerMigrator, InvalidOperation, InvalidValue, LiteralString, Migration, MigrationDSL, Migrator, Model, NoExistingObject, NotImplemented, PoolTimeout, Rollback, ShardedSingleConnectionPool, ShardedThreadedConnectionPool, SimpleMigration, SingleConnectionPool, ThreadedConnectionPool, TimestampMigrator, ValidationFailed
Constant Summary collapse
- MAJOR =
3
- MINOR =
12
- TINY =
0
- VERSION =
[MAJOR, MINOR, TINY].join('.')
- ADAPTER_MAP =
Hash of adapters that have been used. The key is the adapter scheme symbol, and the value is the Database subclass.
{}
- DATABASES =
Array of all databases to which Sequel has connected. If you are developing an application that can connect to an arbitrary number of databases, delete the database objects from this or they will not get garbage collected.
[]
- LOCAL_DATETIME_OFFSET_SECS =
The offset of the current time zone from UTC, in seconds.
Time.now.utc_offset
- LOCAL_DATETIME_OFFSET =
The offset of the current time zone from UTC, as a fraction of a day.
respond_to?(:Rational, true) ? Rational(LOCAL_DATETIME_OFFSET_SECS, 60*60*24) : LOCAL_DATETIME_OFFSET_SECS/60/60/24.0
- DEFAULT_INFLECTIONS_PROC =
Proc that is instance evaled to create the default inflections for both the model inflector and the inflector extension.
proc do plural(/$/, 's') plural(/s$/i, 's') plural(/(alias|(?:stat|octop|vir|b)us)$/i, '\1es') plural(/(buffal|tomat)o$/i, '\1oes') plural(/([ti])um$/i, '\1a') plural(/sis$/i, 'ses') plural(/(?:([^f])fe|([lr])f)$/i, '\1\2ves') plural(/(hive)$/i, '\1s') plural(/([^aeiouy]|qu)y$/i, '\1ies') plural(/(x|ch|ss|sh)$/i, '\1es') plural(/(matr|vert|ind)ix|ex$/i, '\1ices') plural(/([m|l])ouse$/i, '\1ice') singular(/s$/i, '') singular(/([ti])a$/i, '\1um') singular(/(analy|ba|cri|diagno|parenthe|progno|synop|the)ses$/i, '\1sis') singular(/([^f])ves$/i, '\1fe') singular(/([h|t]ive)s$/i, '\1') singular(/([lr])ves$/i, '\1f') singular(/([^aeiouy]|qu)ies$/i, '\1y') singular(/(m)ovies$/i, '\1ovie') singular(/(x|ch|ss|sh)es$/i, '\1') singular(/([m|l])ice$/i, '\1ouse') singular(/buses$/i, 'bus') singular(/oes$/i, 'o') singular(/shoes$/i, 'shoe') singular(/(alias|(?:stat|octop|vir|b)us)es$/i, '\1') singular(/(vert|ind)ices$/i, '\1ex') singular(/matrices$/i, 'matrix') irregular('person', 'people') irregular('man', 'men') irregular('child', 'children') irregular('sex', 'sexes') irregular('move', 'moves') irregular('quiz', 'quizzes') irregular('testis', 'testes') uncountable(%w(equipment information rice money species series fish sheep news)) end
Constants included from SQL::Constants
SQL::Constants::CURRENT_DATE, SQL::Constants::CURRENT_TIME, SQL::Constants::CURRENT_TIMESTAMP, SQL::Constants::NOTNULL, SQL::Constants::NULL, SQL::Constants::SQLFALSE, SQL::Constants::SQLTRUE
Class Attribute Summary collapse
-
.convert_two_digit_years ⇒ Object
Sequel converts two digit years in Dates and DateTimes by default, so 01/02/03 is interpreted at January 2nd, 2003, and 12/13/99 is interpreted as December 13, 1999.
-
.datetime_class ⇒ Object
Sequel can use either Time or DateTime for times returned from the database.
-
.virtual_row_instance_eval ⇒ Object
Returns the value of attribute virtual_row_instance_eval.
Attributes included from Timezones
#application_timezone, #database_timezone, #typecast_timezone
Class Method Summary collapse
-
.condition_specifier?(obj) ⇒ Boolean
Returns true if the passed object could be a specifier of conditions, false otherwise.
-
.connect(*args, &block) ⇒ Object
Creates a new database object based on the supplied connection string and optional arguments.
-
.convert_exception_class(exception, klass) ⇒ Object
Convert the exception to the given class.
-
.extension(*extensions) ⇒ Object
Load all Sequel extensions given.
-
.identifier_input_method=(value) ⇒ Object
Set the method to call on identifiers going into the database.
-
.identifier_output_method=(value) ⇒ Object
Set the method to call on identifiers coming out of the database.
-
.inflections {|Inflections| ... } ⇒ Object
Yield the Inflections module if a block is given, and return the Inflections module.
-
.k_require ⇒ Object
Alias to the standard version of require.
-
.migration(&block) ⇒ Object
The preferred method for writing Sequel migrations, using a DSL:.
-
.Model(source) ⇒ Object
Lets you create a Model subclass with its dataset already set.
-
.quote_identifiers=(value) ⇒ Object
Set whether to quote identifiers for all databases by default.
-
.require(files, subdir = nil) ⇒ Object
Require all given files which should be in the same or a subdirectory of this file.
-
.single_threaded=(value) ⇒ Object
Set whether to set the single threaded mode for all databases by default.
-
.string_to_date(s) ⇒ Object
Converts the given string into a Date object.
-
.string_to_datetime(s) ⇒ Object
Converts the given string into a Time or DateTime object, depending on the value of Sequel.datetime_class.
-
.string_to_time(s) ⇒ Object
Converts the given string into a Time object.
-
.ts_require(*args) ⇒ Object
Same as Sequel.require, but wrapped in a mutex in order to be thread safe.
-
.tsk_require(*args) ⇒ Object
Same as Kernel.require, but wrapped in a mutex in order to be thread safe.
-
.version ⇒ Object
The version of Sequel you are using, as a string (e.g. “2.11.0”).
-
.virtual_row(&block) ⇒ Object
If the supplied block takes a single argument, yield a new SQL::VirtualRow instance to the block argument.
Methods included from Timezones
application_to_database_timestamp, database_to_application_timestamp, default_timezone=, typecast_to_application_timestamp
Class Attribute Details
.convert_two_digit_years ⇒ Object
Sequel converts two digit years in Dates and DateTimes by default, so 01/02/03 is interpreted at January 2nd, 2003, and 12/13/99 is interpreted as December 13, 1999. You can override this to treat those dates as January 2nd, 0003 and December 13, 0099, respectively, by setting this to false.
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# File 'lib/sequel/core.rb', line 66 def convert_two_digit_years @convert_two_digit_years end |
.datetime_class ⇒ Object
Sequel can use either Time or DateTime for times returned from the database. It defaults to Time. To change it to DateTime, set this to DateTime.
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# File 'lib/sequel/core.rb', line 70 def datetime_class @datetime_class end |
.virtual_row_instance_eval ⇒ Object
Returns the value of attribute virtual_row_instance_eval.
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# File 'lib/sequel/core.rb', line 72 def virtual_row_instance_eval @virtual_row_instance_eval end |
Class Method Details
.condition_specifier?(obj) ⇒ Boolean
Returns true if the passed object could be a specifier of conditions, false otherwise. Currently, Sequel considers hashes and arrays of all two pairs as condition specifiers.
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# File 'lib/sequel/core.rb', line 97 def self.condition_specifier?(obj) case obj when Hash true when Array !obj.empty? && obj.all?{|i| (Array === i) && (i.length == 2)} else false end end |
.connect(*args, &block) ⇒ Object
Creates a new database object based on the supplied connection string and optional arguments. The specified scheme determines the database class used, and the rest of the string specifies the connection options. For example:
DB = Sequel.connect('sqlite:/') # Memory database
DB = Sequel.connect('sqlite://blog.db') # ./blog.db
DB = Sequel.connect('sqlite:///blog.db') # /blog.db
DB = Sequel.connect('postgres://user:password@host:port/database_name')
DB = Sequel.connect('sqlite:///blog.db', :max_connections=>10)
If a block is given, it is passed the opened Database object, which is closed when the block exits. For example:
Sequel.connect('sqlite://blog.db'){|db| puts db[:users].count}
For details, see the “Connecting to a Database” guide. To set up a master/slave or sharded database connection, see the “Master/Slave Databases and Sharding” guide.
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# File 'lib/sequel/core.rb', line 126 def self.connect(*args, &block) Database.connect(*args, &block) end |
.convert_exception_class(exception, klass) ⇒ Object
Convert the exception to the given class. The given class should be Sequel::Error or a subclass. Returns an instance of klass with the message and backtrace of exception.
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# File 'lib/sequel/core.rb', line 133 def self.convert_exception_class(exception, klass) return exception if exception.is_a?(klass) e = klass.new("#{exception.class}: #{exception.}") e.wrapped_exception = exception e.set_backtrace(exception.backtrace) e end |
.extension(*extensions) ⇒ Object
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# File 'lib/sequel/core.rb', line 146 def self.extension(*extensions) extensions.each{|e| tsk_require "sequel/extensions/#{e}"} end |
.identifier_input_method=(value) ⇒ Object
Set the method to call on identifiers going into the database. This affects the literalization of identifiers by calling this method on them before they are input. Sequel upcases identifiers in all SQL strings for most databases, so to turn that off:
Sequel.identifier_input_method = nil
to downcase instead:
Sequel.identifier_input_method = :downcase
Other String instance methods work as well.
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# File 'lib/sequel/core.rb', line 161 def self.identifier_input_method=(value) Database.identifier_input_method = value end |
.identifier_output_method=(value) ⇒ Object
Set the method to call on identifiers coming out of the database. This affects the literalization of identifiers by calling this method on them when they are retrieved from the database. Sequel downcases identifiers retrieved for most databases, so to turn that off:
Sequel.identifier_output_method = nil
to upcase instead:
Sequel.identifier_output_method = :upcase
Other String instance methods work as well.
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# File 'lib/sequel/core.rb', line 177 def self.identifier_output_method=(value) Database.identifier_output_method = value end |
.inflections {|Inflections| ... } ⇒ Object
Yield the Inflections module if a block is given, and return the Inflections module.
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# File 'lib/sequel/model/inflections.rb', line 4 def self.inflections yield Inflections if block_given? Inflections end |
.k_require ⇒ Object
Alias to the standard version of require
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# File 'lib/sequel/core.rb', line 75 alias k_require require |
.migration(&block) ⇒ Object
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# File 'lib/sequel/extensions/migration.rb', line 124 def self.migration(&block) MigrationDSL.create(&block) end |
.Model(source) ⇒ Object
Lets you create a Model subclass with its dataset already set. source can be an existing dataset or a symbol (in which case it will create a dataset using the default database with the given symbol as the table name).
The purpose of this method is to set the dataset automatically for a model class, if the table name doesn’t match the implicit name. This is neater than using set_dataset inside the class, doesn’t require a bogus query for the schema, and allows it to work correctly in a system that uses code reloading.
Example:
class Comment < Sequel::Model(:something)
table_name # => :something
end
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# File 'lib/sequel/model.rb', line 19 def self.Model(source) Model::ANONYMOUS_MODEL_CLASSES[source] ||= if source.is_a?(Database) c = Class.new(Model) c.db = source c else Class.new(Model).set_dataset(source) end end |
.quote_identifiers=(value) ⇒ Object
Set whether to quote identifiers for all databases by default. By default, Sequel quotes identifiers in all SQL strings, so to turn that off:
Sequel.quote_identifiers = false
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# File 'lib/sequel/core.rb', line 185 def self.quote_identifiers=(value) Database.quote_identifiers = value end |
.require(files, subdir = nil) ⇒ Object
Require all given files which should be in the same or a subdirectory of this file. If a subdir is given, assume all files are in that subdir.
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# File 'lib/sequel/core.rb', line 191 def self.require(files, subdir=nil) Array(files).each{|f| super("#{File.dirname(__FILE__)}/#{"#{subdir}/" if subdir}#{f}")} end |
.single_threaded=(value) ⇒ Object
Set whether to set the single threaded mode for all databases by default. By default, Sequel uses a threadsafe connection pool, which isn’t as fast as the single threaded connection pool. If your program will only have one thread, and speed is a priority, you may want to set this to true:
Sequel.single_threaded = true
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# File 'lib/sequel/core.rb', line 201 def self.single_threaded=(value) Database.single_threaded = value end |
.string_to_date(s) ⇒ Object
Converts the given string into a Date object.
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# File 'lib/sequel/core.rb', line 206 def self.string_to_date(s) begin Date.parse(s, Sequel.convert_two_digit_years) rescue => e raise convert_exception_class(e, InvalidValue) end end |
.string_to_datetime(s) ⇒ Object
Converts the given string into a Time or DateTime object, depending on the value of Sequel.datetime_class.
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# File 'lib/sequel/core.rb', line 216 def self.string_to_datetime(s) begin if datetime_class == DateTime DateTime.parse(s, convert_two_digit_years) else datetime_class.parse(s) end rescue => e raise convert_exception_class(e, InvalidValue) end end |
.string_to_time(s) ⇒ Object
Converts the given string into a Time object.
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# File 'lib/sequel/core.rb', line 229 def self.string_to_time(s) begin Time.parse(s) rescue => e raise convert_exception_class(e, InvalidValue) end end |
.ts_require(*args) ⇒ Object
Same as Sequel.require, but wrapped in a mutex in order to be thread safe.
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# File 'lib/sequel/core.rb', line 238 def self.ts_require(*args) check_requiring_thread{require(*args)} end |
.tsk_require(*args) ⇒ Object
Same as Kernel.require, but wrapped in a mutex in order to be thread safe.
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# File 'lib/sequel/core.rb', line 243 def self.tsk_require(*args) check_requiring_thread{k_require(*args)} end |
.version ⇒ Object
The version of Sequel you are using, as a string (e.g. “2.11.0”)
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# File 'lib/sequel/version.rb', line 9 def self.version VERSION end |
.virtual_row(&block) ⇒ Object
If the supplied block takes a single argument, yield a new SQL::VirtualRow instance to the block argument. Otherwise, evaluate the block in the context of a new SQL::VirtualRow instance.
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# File 'lib/sequel/core.rb', line 251 def self.virtual_row(&block) vr = SQL::VirtualRow.new case block.arity when -1, 0 vr.instance_eval(&block) else block.call(vr) end end |