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Bump version to 3.8.0

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1 parent 9effdcf commit f8fd1110f6db1b8cc3038d28d99f93bfbdbed228 @jeremyevans committed Jan 4, 2010
Showing with 153 additions and 2 deletions.
  1. +1 −1 CHANGELOG
  2. +151 −0 doc/release_notes/3.8.0.txt
  3. +1 −1 lib/sequel/version.rb
@@ -1,4 +1,4 @@
-=== HEAD
+=== 3.8.0 (2010-01-04)
* Catch cases in the postgres adapter where exceptions weren't converted or raised appropriately (jeremyevans)
@@ -0,0 +1,151 @@
+New Features
+* Dataset#each_server was added, allowing you to run the same query
+ (most likely insert/update/delete) on all shards. This is useful
+ if you have a sharded database but have lookup tables that should
+ be identical on all shards. It works by yielding copies of the
+ current dataset that are tied to each server/shard:
+ DB[:table].filter(:id=>1).each_server do |ds|
+ ds.update(:name=>'foo')
+ end
+* Database#each_server was added, allowing you to run schema
+ modification methods on all shards. It works by yielding a
+ new Sequel::Database object for each shard, that will connect to
+ only that shard:
+ DB.each_server do |db|
+ db.create_table(:t){Integer :num}
+ end
+* You can now add and remove servers/shards from the connection
+ pool while Sequel is running:
+ DB.add_servers(:shard1=>{:host=>'s1'}, :shard2=>{:host=>'s2'})
+ DB.remove_servers(:shard1, :shard2)
+* When you attempt to disconnect from a server that has connections
+ currently in use, Sequel will now schedule those connections to
+ be disconnected when they are returned to the pool. Previously,
+ Sequel disconnected available connections, but ignored connections
+ currently in use, so it wasn't possible to guarantee complete
+ disconnection from the server. Even with this new feature, you can
+ only guarantee eventual disconnection, since disconnection of
+ connections in use happens asynchronously.
+* Database#disconnect now accepts a :servers option specifying the
+ server(s) from which to disconnect. This should be a symbol or
+ array of symbols representing servers/shards. Only those specified
+ will be disconnected:
+ DB.disconnect(:servers=>[:shard1, :shard2])
+* A validates_type validation was added to the validation_helpers
+ plugin. It allows you to check that a given column contains
+ the correct type. I can be helpful if you are also using the
+ serialization plugin to store serialized ruby objects, by making
+ sure that the objects are of the correct type (e.g. Hash):
+ def validate
+ validates_type(Hash, :options)
+ end
+* Sequel::SQL::Expression#== is now supported for all expressions:
+ :column.qualify(:table).cast(:type) == \
+ :column.qualify(:table).cast(:type)
+ # => true
+ :column.qualify(:table).cast(:type) == \
+ :other_column.qualify(:table).cast(:type)
+ # => false
+* When using the generic File type to create blob columns on
+ MySQL, you can specify the specific database type by using the
+ :size option (with :tiny, :medium, and :long values recognized):
+ DB.create_table(:docs){File :body, :size=>:long} # longblob
+* The mysql adapter will now default to using mysqlplus, falling
+ back to use mysql. mysqlplus is significantly better for threaded
+ code because queries do not block the entire interpreter.
+* The JDBC adapter is now able to detect certain types of disconnect
+ errors.
+* ConnectionPool.servers and Database.servers were added, which
+ return an array of symbols specifying the servers/shards in use.
+Other Improvements
+* The single-threaded connection pool now raises
+ DatabaseConnectionErrors if unable to connect, so it now operates
+ more similarly to the default connection pool.
+* The single-threaded connection pool now operates more similar
+ to the default connection pool when given a nonexistent server.
+* PGErrors are now correctly converted to DatabaseErrors in the
+ postgres adapter when preparing statements or executing prepared
+ statements.
+* DatabaseDisconnectErrors are now raised correctly in the postgres
+ adapter if the connection status is not OK after a query raises an
+ error.
+* In the mysql adapter, multiple statements in a single query should
+ now be handled correctly in the all cases, not just when using
+ Dataset#each. So you can now submit multiple queries in a single
+ string to Database#run.
+* Model object creation on Microsoft SQL Server 2000 once again
+ works correctly. Previously, an optimization was used that was
+ only supported on 2005+.
+* Backslashes are no longer doubled inside string literals when
+ connecting to Microsoft SQL Server.
+* The ORDER clause now correctly comes after the HAVING clause on
+ Microsoft SQL Server.
+* Sequel now checks that there is an active transaction before
+ rolling back transactions on Microsoft SQL Server, since
+ there are cases where Microsoft SQL Server will roll back
+ transactions implicitly.
+* Blobs are now handled correctly when connecting to H2.
+* 64-bit integers are now handled correctly in JDBC prepared
+ statements.
+* In the boolean_readers plugin, correctly handle columns not in
+ the db_schema, and don't raise an error if the model's columns
+ can't be determined.
+* In the identity_map plugin, remove instances from the cache if they
+ are deleted or destroyed.
+Backwards Compatibility
+* Dataset::FROM_SELF_KEEP_OPTS was merged into
+ Dataset::NON_SQL_OPTIONS. While used in different places, they
+ were used for the same purpose, and entries missing from one should
+ have been included in the other.
+* The connection pool internals changed substantially. Now,
+ ConnectionPool #allocated and #available_connections will return
+ nil instead of an array or hash if they are called with a
+ nonexistent server. These are generally only used internally,
+ though they are part of the public API. #created_count and #size
+ still return the size of the :default server when called with a
+ nonexistent server, though.
+* The meta_eval and metaclass private methods were removed from
+ Sequel::MetaProgramming (only the meta_def public method remains).
+ If you want these methods, use the metaid gem.
+* The irregular ox->oxen pluralization rule was removed from the
+ default inflections, as it screws up the more common box->boxes.
@@ -1,6 +1,6 @@
module Sequel
- MINOR = 7
+ MINOR = 8
TINY = 0

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