ANN: Sequel 3.14.0 Released

Sequel is a lightweight database access toolkit for Ruby.

  • Sequel provides thread safety, connection pooling and a concise
    DSL for constructing SQL queries and table schemas.
  • Sequel includes a comprehensive ORM layer for mapping records to
    Ruby objects and handling associated records.
  • Sequel supports advanced database features such as prepared
    statements, bound variables, stored procedures, savepoints,
    two-phase commit, transaction isolation, master/slave
    configurations, and database sharding.
  • Sequel currently has adapters for ADO, Amalgalite, DataObjects,
    DB2, DBI, Firebird, Informix, JDBC, MySQL, ODBC, OpenBase, Oracle,
    PostgreSQL and SQLite3.

Sequel 3.14.0 has been released and should be available on the gem
mirrors.

= New Features

  • Dataset#grep now accepts :all_patterns, :all_columns, and
    :case_insensitive options. Previously, grep would use a case
    sensitive search where it would match if any pattern matched any
    column. These three options give you more control over how the
    pattern matching will work:

    dataset.grep([:a, :b], %w’%test% foo’)

    WHERE ((a LIKE ‘%test%’) OR (a LIKE ‘foo’)

    OR (b LIKE ‘%test%’) OR (b LIKE ‘foo’))

    dataset.grep([:a, :b], %w’%foo% %bar%’, :all_patterns=>true)

    WHERE (((a LIKE ‘%foo%’) OR (b LIKE ‘%foo%’))

    AND ((a LIKE ‘%bar%’) OR (b LIKE ‘%bar%’)))

    dataset.grep([:a, :b], %w’%foo% %bar%’, :all_columns=>true)

    WHERE (((a LIKE ‘%foo%’) OR (a LIKE ‘%bar%’))

    AND ((b LIKE ‘%foo%’) OR (b LIKE ‘%bar%’)))

    dataset.grep([:a, :b], %w’%foo% %bar%’,
    :all_patterns=>true,:all_columns=>true)

    WHERE ((a LIKE ‘%foo%’) AND (b LIKE ‘%foo%’)

    AND (a LIKE ‘%bar%’) AND (b LIKE ‘%bar%’))

    dataset.grep([:a, :b], %w’%test% foo’, :case_insensitive=>true)

    WHERE ((a ILIKE ‘%test%’) OR (a ILIKE ‘foo’)

    OR (b ILIKE ‘%test%’) OR (b ILIKE ‘foo’))

  • When using the schema plugin, you can now provide a block to the
    create_table methods to set the schema and create the table
    in the same call:

    class Artist < Sequel::Model
    create_table do
    primary_key :id
    String :name
    end
    end

  • The tree plugin now accepts a :single_root option, which uses a
    before_save hook to attempt to ensure that there is only a single
    root in the tree. It also adds a Model.root method to get the
    single root of the tree.

  • The tree plugin now adds a Model#root? instance method to check
    if the current node is a root of the tree.

  • Model#save now takes a :raise_on_failure option which will
    override the object’s raise_on_save_failure setting. This makes
    it easier to get the desired behavior (raise or just return false)
    in library code without using a begin/ensure block.

  • The Database#adapter_scheme instance method was added, which
    operates the same as the class method.

  • Sequel now handles the literalization of OCI8::CLOB objects in
    the Oracle adapter.

= Other Improvements

  • When using the timezone support, Sequel will now correctly load
    times and datetimes in standard time when the current timezone is
    in daylight time, or vice versa. Previously, if you tried to
    to load a time or datetime in December when in July in a timezone
    that used daylight time, it would be off by an hour.

  • The rcte_tree plugin now works correctly when a :conditions option
    is used.

  • The single_table_inheritance plugin now works correctly when the
    class discriminator column has the same name as an existing ruby
    method (such as type).

  • Database#each_server now works correctly when a connection string
    is used to connect, instead of an options hash.

  • Model#destroy now respects the object’s use_transactions setting,
    instead of always using a transaction.

  • Model#exists? now uses a simpler and faster query.

  • Sequel now handles the aggregate methods such as count and sum
    correctly on Microsoft SQL Server when using an ordered dataset
    with a clause such as DISTINCT or GROUP and without a limit.

  • Sequel now handles rename_table correctly on Microsoft SQL Server
    when using a case sensitive collation, or when qualifying the
    table with a schema.

  • Sequel now parses the schema correctly on Oracle when the same
    table name is used in multiple schemas.

  • Sequel now handles OCIInvalidHandle errors when disconnecting
    in the Oracle adapter.

  • Sequel now raises a Sequel::Error instead of an ArgumentError
    if the current or target migration version does not exist.

  • When a mismatched number of composite keys are used in
    associations, Sequel now uses a more detailed error message.

  • Significant improvements were made to the Dataset and Model
    RDoc documentation.

= Backwards Compatibility

  • Model#valid? now must accept an optional options hash.

  • The Model#save_failure private method was renamed to
    raise_hook_failure.

  • The LOCAL_DATETIME_OFFSET_SECS and LOCAL_DATETIME_OFFSET constants
    have been removed from the Sequel module.

  • Sequel now uses obj.to_json instead of JSON.generate(obj). This
    shouldn’t affect backwards compatibility, but did fix a bug in
    certain cases.

Thanks,
Jeremy

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