| Commit message (Collapse) | Author | Age | Files | Lines |
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`add_reference` can very helpfully add a multi-column index when you use
it to add a polymorphic reference. However, the first column in the
index is the `id` column, which is less than ideal.
The [PostgreSQL docs][1] say:
> A multicolumn B-tree index can be used with query conditions that
> involve any subset of the index's columns, but the index is most
> efficient when there are constraints on the leading (leftmost)
> columns.
The [MySQL docs][2] say:
> MySQL can use multiple-column indexes for queries that test all the
> columns in the index, or queries that test just the first column, the
> first two columns, the first three columns, and so on. If you specify
> the columns in the right order in the index definition, a single
> composite index can speed up several kinds of queries on the same
> table.
In a polymorphic relationship, the type column is much more likely to be
useful as the first column in an index than the id column. That is, I'm
more likely to query on type without an id than I am to query on id
without a type.
[1]: http://www.postgresql.org/docs/9.3/static/indexes-multicolumn.html
[2]: http://dev.mysql.com/doc/refman/5.0/en/multiple-column-indexes.html
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In the DSL you can now do:
create_table(:foos) do |t|
t.bigint :hi
end
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to drop sequences at the same time each tables dropped for Oracle
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Since 'drop table if exists' statement does not always work with
some databases such as Oracle.
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Change the default `null` value for timestamps
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As per discussion, this changes the model generators to specify
`null: false` for timestamp columns. A warning is now emitted if
`timestamps` is called without a `null` option specified, so we can
safely change the behavior when no option is specified in Rails 5.
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[Yves Senn & Matthew Draper]
The column check was embodied in the defaul index name.
If the :name option was used, the specified columns were not verified at all.
Given:
```
assert connection.index_exists?(table_name, :foo_id, :name => :index_testings_on_yo_momma)
```
That index could have been defined on any field, not necessarily on `:foo_id`.
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* Allow to specify a type for foreign key column in migrations
* unified the docs
* some cleanup in CHANGELOG
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[Andrey Novikov & Łukasz Sarnacki]
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Before this change, create_join_table would not remove the common prefix
in the join table name, unlike ActiveRecord::Reflections. A HABTM
between Music::Artist and Music::Record would use a table
music_artists_records, while create_join table would create
music_artists_music_records.
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These tests were passing before because the precision were not using to
cast the value. Not it is being used so it would fail on sqlite3
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The name of the foreign key is not relevant from a users perspective.
Using random names resolves the urge to rename the foreign key when the
respective table or column is renamed.
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This allows to create and remove foreign keys without specifying a column.
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respect `table_name_prefix` and `table_name_suffix`.
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Don't type cast the default on the column
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If we want to have type decorators mess with the attribute, but not the
column, we need to stop type casting on the column. Where possible, we
changed the tests to test the value of `column_defaults`, which is
public API. `Column#default` is not.
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Add test cases for Migration#inverse_of
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Skip migration check if adapter doesn't support it
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While running Sqlite3 memory tests I encountered the following error:
```
Finished in 69.416366s, 58.0267 runs/s, 162.3681 assertions/s.
1) Error:
ActiveRecord::Migration::ChangeSchemaTest#test_add_column_with_timestamp_type:
NoMethodError: undefined method `type' for nil:NilClass
/Users/senny/Projects/rails/activerecord/test/cases/migration/change_schema_test.rb:244:in `test_add_column_with_timestamp_type'
4028 runs, 11271 assertions, 0 failures, 1 errors, 1 skips
```
This was because the table `testings` was used in multiple test-cases.
This resulted in a wrongly cached schema on `ActiveRecord::Base.schema_chae`.
/cc @zuhao
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The `:timestamp` type for columns is unused. All database adapters treat
them as the same database type. All code in `ActiveRecord` which changes
its behavior based on the column's type acts the same in both cases.
However, when the type is passed to code that checks for the `:datetime`
type, but not `:timestamp` (such as XML serialization), the result is
unexpected behavior.
Existing schema definitions will continue to work, and the `timestamp`
type is transparently aliased to `datetime`.
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This is an illustration of https://github.com/rails/rails/pull/13435#issuecomment-33789752
Removing the limit from the PG and SQLite adapter solves the issue.
MySQL is still affected by the issue.
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Follow-Up to https://github.com/rails/rails/pull/14348
Ensure that SQLCounter.clear_log is called after each test.
This is a step to prevent side effects when running tests. This will allow us to run them in random order.
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Previously when reverting a migration which added a named index it
would instead drop a corresponding index with matching columns but
without a name.
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Closes #13623.
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- Earlier, change_table was creating database-agnostic object.
- After this change, it will create correct object based on current
database adapter.
- This will ensure that create_table and change_table will get same objects.
- This makes update_table_definition method public and nodoc.
- Fixes #13577 and #13503
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renamed to `Minitest`
Ref: https://github.com/seattlerb/minitest/blob/master/History.txt
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