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=== HEAD | ||
=== 3.31.0 (2012-01-03) | ||
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* Dataset#from no longer handles :a__b__c___d as a.b.c AS d (jeremyevans) | ||
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= New Features | ||
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* The serialization plugin can now support custom serialization | ||
formats, by supplying a serializer/deserializer pair of | ||
callable objects. You can also register custom deserializers | ||
via Sequel::Plugins::Serialization.register_format, so that | ||
they can be referenced by name. Example: | ||
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Sequel::Plugins::Serialization.register_format(:reverse, | ||
lambda{|v| v.reverse}, | ||
lambda{|v| v.reverse}) | ||
class User < Sequel::Model | ||
serialize_attributes :reverse, :password | ||
end | ||
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* Dataset#import and #multi_insert now support a | ||
:return=>:primary_key option. When this option is used, the | ||
methods return an array of primary key values, one for each | ||
inserted row. Usage of this option on MySQL requires that a | ||
separate query be issued per row (instead of the single | ||
query for all rows that MySQL would usually use). | ||
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* PostgreSQL can now use Dataset#returning in conjunction with | ||
import/multi_insert to set a custom column to return. | ||
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* Microsoft SQL Server can now use Dataset#output in conjection with | ||
import/multi_insert to set a custom column to return. | ||
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* Dataset#import and #multi_insert now respect a :server option to | ||
set the server/shard on which to execute the queries. | ||
Additionally, options given to this method are also passed to | ||
Dataset#transaction. | ||
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* Dataset#insert_multiple now returns an array of inserted primary | ||
keys. | ||
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* Model.def_column_alias has been added to make it easy to create | ||
alias methods for columns. This is useful if you have a legacy | ||
database and want to create friendly method names for the | ||
underlying columns. Note that this alias only affects the setter | ||
and getter methods. This does not affect the dataset level, so you | ||
still need to use the actual column names in dataset filters. | ||
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* many_to_one associations can now have the same name as the related | ||
foreign key column, using the :key_column option. Use of this | ||
feature is not recommended, as it is much better to either rename | ||
the column or rename the association. Here's an example of usage: | ||
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# Example schema: | ||
# albums artists | ||
# :id /--> :id | ||
# :artist --/ :name | ||
# :name | ||
class Album < Sequel::Model | ||
def_column_alias(:artist_id, :artist) | ||
many_to_one :artist, :key_column=>:artist | ||
end | ||
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* The mock adapter can now mock out database types, by providing a | ||
shared adapter name as the host (e.g. mock://postgres). This | ||
emulation is not perfect, but in most cases it allows you to see | ||
what SQL Sequel would generate on a given database without needing | ||
to install the required database driver. | ||
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* Sequel now supports creating full text indexes on Microsoft SQL | ||
Server. Before using it, you must have previously setup a default | ||
full text search catalog, and you need to provide a :key_index | ||
option with an index name symbol. | ||
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* Dataset#group_rollup and #group_cube methods have been added for | ||
GROUP BY ROLLUP and GROUP BY CUBE support. These features are in | ||
a recent SQL standard, and they are supported to various degrees on | ||
Microsoft SQL Server, DB2, Oracle, MySQL, and Derby. | ||
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* Dataset#full_text_search on Microsoft SQL Server now supports | ||
multiple search terms. | ||
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* The jdbc adapter now supports a :login_timeout option, giving the | ||
timeout in seconds. | ||
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= Other Improvements | ||
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* Dataset#exists can now be used with prepared statement | ||
placeholders. | ||
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* Dataset#full_text_search can now be used with prepared statement | ||
placeholders on PostgreSQL, MySQL, and Microsoft SQL Server. | ||
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* If tables from two separate schema are detected when parsing the | ||
schema for a table on PostgreSQL, an error is now raised. | ||
Previously, no error was raised, which led to weird errors later, | ||
such as duplicate columns in a model's primary_key. | ||
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* RETURNING is now supported with UPDATE/DELETE on PostgreSQL 8.2+. | ||
Previously, Sequel only supported it on 9.1+, but PostgreSQL | ||
introduced support for it in 8.2. | ||
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* The shared postgres adapter now correctly handles the return value | ||
for Dataset#insert if you provide a separate column array and value | ||
array on PostgreSQL < 8.2. | ||
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* Handle case in the PostgreSQL adapter where the server version | ||
cannot be determined via a query. | ||
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* H2 clob types are now treated as string instead of as blob. | ||
Treating clob as blob breaks on H2, as it doesn't automatically | ||
hex-unescape the input for clobs as it does for blobs. | ||
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* Dataset#empty? now works correctly when the dataset has an offset | ||
and offset support is being emulated. | ||
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* The mock adapter no longer defaults to downcasing identifiers on | ||
output. | ||
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= Backwards Compatibility | ||
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* Dataset#exists now returns a PlaceholderLiteralString instead of a | ||
LiteralString, which could potentially break some code. If you | ||
would like a String returned, you can pass the returned object to | ||
Dataset#literal: | ||
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dataset.literal(dataset.exists) | ||
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* Dataset#from no longer handles :a__b__c___d as "a.b.c AS d". This | ||
was not the intended behavior, and nowhere else in Sequel is a | ||
symbol treated that way. Now, Dataset#from is consistent with the | ||
rest of Sequel, using "a.b__c AS d". This should only affect | ||
people in very rare cases, as most databases don't use three level | ||
qualified tables. One exception is Microsoft SQL Server, which can | ||
use three level qualified tables for cross-database access. | ||
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* Previously, Dataset#insert_multiple returned an array of hashes, now | ||
it returns an array of primary key values. | ||
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* Dataset#EXRACT_CLOSE in the shared sqlite adapter has been renamed to | ||
Dataset#EXTRACT_CLOSE. | ||
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* Dataset::StoredProcedureMethods::SQL_QUERY_TYPE and | ||
Dataset::ArgumentMapper::SQL_QUERY_TYPE constants have been removed, | ||
as have related sql_query_type private methods. | ||
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* The serialization plugin was significantly refactored. | ||
Model.serialization_map now contains a callable object instead of a | ||
Symbol, and Model.serialization_format has been removed. | ||
Model.define_serialized_attribute_accessors private method now takes | ||
two callable objects before the columns, instead of a single symbol. |
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