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Bump version to 3.6.0

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1 parent 2a5bc3e commit 8411e15c1445a5f310bf9c887ba7cd7b3ef47600 @jeremyevans committed Nov 2, 2009
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  1. +1 −1 CHANGELOG
  2. +366 −0 doc/release_notes/3.6.0.txt
  3. +1 −1 lib/sequel/version.rb
@@ -1,4 +1,4 @@
-=== HEAD
+=== 3.6.0 (2009-11-02)
* Make the MSSQL shared adapter correctly parse the column schema information for tables in the non-default database schema (rohit.namjoshi)
@@ -0,0 +1,366 @@
+New Features
+* Dataset#filter and related methods now accept a string with named
+ placeholders, and a hash with placeholder values:
+ ds.filter('copies_sold > :sales', :sales=>500000)
+ Sequel's general support for this syntax is nicer:
+ ds.filter{copies_sold > 500000}
+ But named placeholder support can make it easier to port code
+ from other database libraries. Also, it works much better than
+ the ? placeholder support if you have a long SQL statement:
+ DB['SELECT :n FROM t WHERE p > :q AND p < :r', :n=>1,:q=>2,:r=>3]
+ Sequel doesn't subsitute values that don't appear in the hash:
+ ds.where('price < :p AND id in :ids', :p=>100)
+ # WHERE (price < 100 AND id in :ids)
+ This makes it easier to spot missed placeholders, and avoids issues
+ with PostgreSQL's :: casting syntax or : inside string literals.
+* The Model add_ association method now accepts a hash and creates
+ a new associated model object associated to the receiver:
+ Artist[:name=>'YJM'].add_album(:name=>'RF')
+* The Model remove_ association method now accepts a primary key
+ and removes the associated model object from the association. For
+ models using composite primary keys, an array of primary key values
+ can be used. Example:
+ Artist[:name=>'YJM'].remove_album(1) # regular pk
+ Artist[:name=>'YJM'].remove_album([2, 3]) # composite pk
+* Dataset#bind was added, allowing you to bind values before calling
+ Dataset#call. This is more consistent with Sequel's general
+ approach where queries can be built in any order.
+* The native postgres adapter now has Dataset#use_cursor, which
+ allows you to process huge datasets without keeping all records in
+ memory. The default number of rows per cursor fetch is 1000, but
+ that can be modified:
+ DB[:huge_table].use_cursor.each{|r| p r}
+ DB[:huge_table].use_cursor(:rows_per_fetch=>10000).each{|r| p r}
+ This probably won't work with prepared statements or
+ bound variables.
+* The nested_attributes plugin now adds newly created objects to the
+ cached association array immediately, even though the changes
+ are not persisted to the database until after the object is saved.
+ The reasoning for this is that otherwise there is no way to access
+ the newly created associated objects before the save, and no way
+ to access them at all if validation fails.
+ This makes the nested_attributes plugin much easier to use, since
+ now you can just iterate over the cached association array when
+ building the form. If validation fails, it will have the newly
+ created failed objects in the array, so you can easily display the
+ form as the user entered it for them to make changes.
+ This change doesn't affect many_to_one associations, since those
+ don't have a cached association array. This also does not affect
+ updating existing records, since those are already in the cached
+ array.
+* You can now easily override the default options used in the
+ validation_helpers plugin (the recommended validation plugin).
+ Options can be overridden at a global level:
+ Sequel::Plugins::ValidationHelpers::DEFAULT_OPTIONS[:format].
+ merge!(:message=>"incorrect format", :allow_missing=>true)
+ Options can also be overridden on a per-class level:
+ class Album < Sequel::Model
+ plugin :validation_helpers
+ :format=>{:message=>"incorrect format", :allow_missing=>true}}
+ private
+ def default_validation_helpers_options(type)
+ super.merge(DEFAULT_VALIDATION_OPTIONS[type] || {})
+ end
+ end
+* You can now use a proc instead of a string for the
+ validation_helpers :message option. This should allow much
+ easier internationalization support. If a proc is given, Sequel
+ calls it to get the format string to use. Whether the proc should
+ take an argument depends on whether the associated validation
+ method takes an argument before the array of columns to validate,
+ and the argument provided is what is passed to the proc. The
+ exception to this is the validates_not_string method, which doesn't
+ take an argument, but does pass one to the proc (a symbol with the
+ schema type of the column).
+ Combined with the above default option support, full
+ internationalization support for the validation_helpers plugin
+ should be fairly easy.
+* The nested_attributes plugin now accepts a :fields option that
+ specifies the fields that are allowed. If specified, the
+ plugin will use set_only instead of set when mass assigning
+ attributes. Without this, the only way to control which fields
+ are allowed is to set allowed/restricted attributes at a class
+ level in the associated class.
+* Associations now accept a :distinct option which uses the SQL
+ DISTINCT clause. This can be used instead of :uniq for
+ many_to_many and many_through_many associations to handle
+ the uniqueness in the database instead of in ruby. It can
+ also be useful for one_to_many associations to models that
+ don't have primary keys.
+* The caching plugin now accepts an :ignore_exceptions option that
+ allows it to work with memcached (which raises exceptions instead
+ of returning nil for missing records).
+* Sequel now emulates JOIN USING poorly using JOIN ON for databases
+ that don't support JOIN USING (MSSQL and H2). This isn't
+ guaranteed to work for all queries, since USING and ON have
+ different semantics, but should work in most cases.
+* The MSSQL shared adapter now supports insert_select, for faster
+ model object creation. If for some reason you need to disable it,
+ you can use disable_insert_output.
+* Model#modified! has been added which explicitly marks the object
+ as modified. So even if no column values have been modified,
+ calling save_changes/update will still run through the regular
+ save process and call all before and after save/update hooks.
+* Model#marshallable! has been added which removes unmarshallable
+ attributes from the object. Previously, you couldn't marshal
+ a saved model object because it contained a dataset with a
+ singleton class. Custom _dump and _load methods could be used
+ instead, but this approach is easier to implement.
+* Dataset#literal_other now calls sql_literal on the object with
+ the current dataset instance, if the object responds to it.
+ This makes it easier to support the literalization of arbitrary
+ objects.
+ Note that if the object is a subclass of a class handled by
+ an existing dataset literalization method, you cannot use this
+ method. You have to override the specific Dataset#literal_* method
+ in that case.
+* Model#save_changes now accepts an option hash that is passed to
+ save:
+ album.save_changes(:validate=>false)
+* A bunch of Dataset#*_join methods have been added, for specific
+ join types:
+ * cross_join
+ * natural_join
+ * full_join
+ * left_join
+ * right_join
+ * natural_full_join
+ * natural_left_join
+ * natural_right_join
+ Previously, you had to use join_table(:cross, ...) to use a CROSS
+* You can now create clustered indexes on Microsoft SQL Server using
+ the :clustered option.
+* AssociationReflection#associated_object_keys has been added,
+ specifying the keys in the associated model object that are related
+ to this association.
+* Sequel::SQL::SQLArray#to_a was added.
+Other Improvements
+* Constant lookup in virtual row blocks now works correctly in ruby
+ 1.9. Virtual row blocks are based on BasicObject on ruby 1.9,
+ which doesn't allow referencing objects in the top level scope. So
+ the following code would cause an error on 1.9:
+ DB[:bonds].filter{maturity_date >}
+ Sequel now uses a Sequel::BasicObject class on 1.9 with a
+ const_missing that looks up constants in Object, which allows the
+ above code to work.
+* Sequel no longer attempts to load associated objects when
+ one of the key fields in the current table is NULL. This fixes
+ the behavior when the :primary_key option for the association
+ is used to point to a non-primary key.
+ A consequence of this change is that attempting to load a
+ *_to_many association for a new model object now returns
+ an empty array instead of raising an exception. This has its
+ own advantage of allowing the same association viewing code
+ to work on both new and existing objects. Previously, you had
+ to actively avoid calling the association method on new objects,
+ or Sequel would raise an exception.
+* Dataset aggreate methods (sum/avg/min/max/range/interval) now
+ work correctly with limited, grouped, or compound datasets.
+ Previously, count worked with them, but other aggregate methods
+ did not. These methods now use a subquery if called on a
+ limited, grouped or compound dataset.
+* It is no longer required to have an existing GROUP BY clause
+ to use a HAVING clause (except on SQLite, which doesn't permit
+ it). Sequel has always had this limitation, but it's not required
+ by the SQL standard, and there are valid reasons to use HAVING
+ without GROUP BY.
+* Sequel will now emulate support for databases that don't support
+ multiple column IN/NOT IN syntax, such as MSSQL and SQLite:
+ ds.filter([:col1, :col2]=>[[1, 2], [3, 4]].sql_array)
+ # default: WHERE (col1, col2) IN ((1, 2), (3, 4))
+ # emulated: WHERE (((col1 = 1) AND (col2 = 2)) OR
+ # ((col1 = 3) AND (col2 = 4)))
+ This is necessary for eager loading associated objects for models
+ with composite primary keys.
+* Sequel now emulates :column.ilike('blah%') for case insensitive
+ searches on MSSQL and H2. MSSQL is case insensitive by default,
+ so it is the same as like. H2 is case sensitive, so Sequel
+ uses a case insensitive cast there.
+* The nested_attributes plugin no longer allows modification of
+ keys related to the association. This fixes a possible security
+ issue with the plugin, where a user could associate the nested
+ record to a different record. For example:
+ Artist.one_to_many :albums
+ Artist.plugin :nested_attributes
+ Artist.nested_attributes :albums
+ artist = Artist.create
+ artist2 = Artist.create
+ album = Album.create
+ artist.add_album(album)
+ artist.albums_attributes = [{:id=>,
+ :artist_id=>}]
+* The one_to_many remove_* association method now makes sure that the
+ object to be removed is currently associated to this object.
+ Before, the method could be abused to disassociate the object from
+ whatever object it was associated to.
+* Model add_ and remove_ association methods now check that the passed
+ object is of the correct class.
+* Calling the add_* association method no longer adds the record
+ to the cached association array if the object is already in the
+ array. Previously, Sequel did this for reciprocal associations,
+ but not for regular associations.
+ This makes the most sense for one_to_many associations, since
+ those can only be associated to the object once. For many_to_many
+ associations, if you want an option to disable the behavior, please
+ bring it up on the Sequel mailing list.
+* An array with a string and placeholders that is passed to
+ Dataset#filter is no longer modified. Previously:
+ options = ["name like ?", "%dog%"]
+ DB[:players].where(options)
+ options # => ["%dog%"]
+* Getting the most recently inserted autoincremented primary key
+ is now optimized when connecting to MySQL via JDBC.
+* Model.inherited now calls Class.inherited.
+* The MSSQL shared adapter once again works on ruby 1.9. It was
+ broken in 3.5.0 due to minor syntax issues.
+* The force_encoding plugin now handles refreshing an existing
+ object, either explicitly or implicitly when new objects are
+ created.
+ To use the force_encoding plugin with the identity_map plugin, the
+ identity_map plugin should be loaded first.
+* Using nil as a bound variable now works on PostgreSQL. Before,
+ Sequel would incorrectly use "" instead of NULL, since it
+ transformed all objects to strings before binding them. Sequel
+ now binds the objects directly.
+* The Amalgalite adapter is now significantly faster, especially for
+ code that modifies the schema or submits arbitrary SQL statements
+ using Database <<, run, or execute_ddl.
+* Model#save_changes is now used when updating existing associated
+ objects in the nested_attributes plugin. This should be
+ significantly faster for the common case of submitting a complex
+ form with nested objects without making modifications.
+* You can now prepare insert statements that take multiple arguments,
+ such as insert(1, 2, 3) and insert(columns, values).
+* Dataset#group_and_count now supports aliased columns.
+* Adding indexes to tables outside the default schema now works.
+* Eager graphing now works better with models that use aliased tables.
+* Sequel now correctly parses the column schema information for tables
+ in a non-default schema on Microsoft SQL Server.
+* changed_columns is now cleared for when saving new model objects
+ for adapters that support insert_select, such as PostgreSQL.
+* Dataset#replace on MySQL now works correctly when default values
+ are used.
+* Dataset#lock on PostgreSQL now works correctly.
+* Dataset#explain now works correctly on SQLite, and works using
+ any adapter. It also works correctly on Amalgalite.
+* The JDBC adapter now handles binding Time arguments correctly when
+ using prepared statements.
+* Model add_ and remove_ association methods now have more
+ descriptive exception messages.
+* Dataset#simple_select_all? now ignores options that don't affect
+ the SQL, such as :server.
+* Dataset#window in the PostgreSQL adapter now respects existing
+ named windows.
+* Sequel now better handles a failure to begin a new transaction.
+* The dataset code was split into some additional files for improved
+ readability.
+* Many documentation improvements were made.
+Backwards Compatibility
+* Model::Errors no longer uses a default proc, but emulates one in the
+ [] method. This is unlikely to have a negative affect unless you
+ are calling a method on it that doesn't call [] (maybe using it in
+ a C extension?).
+* Model#table_name now only provides the alias if an aliased table is
+ used.
+* The Sequel::Dataset::STOCK_COUNT_OPTS constant has been removed.
+* Dataset#lock on PostgreSQL now returns nil instead of a dataset.
@@ -1,6 +1,6 @@
module Sequel
- MINOR = 5
+ MINOR = 6
TINY = 0

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