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This constant was kept for the sake of backward compatibility; it
is still available under `ActiveSupport::HashWithIndifferentAccess`.
Furthermore, since Ruby 2.5 (https://bugs.ruby-lang.org/issues/11547)
won't support top level constant lookup, people would have to update
their code anyway.
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Extra `data_source_exists?(table_name)` is unneeded if
`drop_table(table_name, if_exists: true)` directly.
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Fixes CI failure caused by #27961.
https://travis-ci.org/rails/rails/jobs/201472146#L2390-L2409
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Simplify and optimize Postgres query for primary_keys()
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primary_keys(table) needs to query various metadata tables in Postgres
to determine the primary key for the table. Previously, it did so using
a complex common table expression against pg_constraint and
pg_attribute.
This patch simplifies the query by using information_schema tables.
This simplifies the logic, making the query far easier to understand,
and additionally avoids an expensive unnest, window function query, and
common table expression.
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knowledge about an index type
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Fix `remove_index` to be able to remove expression indexes
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Fixes #26635, #26641.
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Fix unscope with subquery
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Currently cannot unscope subquery properly.
This commit fixes the issue.
Fixes #26323.
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The `default` arg of `index_name_exists?` makes to optional
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The `default` arg of `index_name_exists?` is only used the adapter does
not implemented `indexes`. But currently all adapters implemented
`indexes` (See #26688). Therefore the `default` arg is never used.
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Extract `quoted_binary` and use it rather than override `_quote`
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Each databases have different binary representation. Therefore all
adapters overrides `_quote` for quoting binary.
Extract `quoted_binary` for quoting binary and use it rather than
override `_quote`.
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Closes #27980
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Closes #27979
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`supports_primary_key?` was added to determine if `primary_key` is
implemented in the adapter in f060221. But we already use `primary_key`
without `supports_primary_key?` (207f266, 5f3cf42) and using
`supports_primary_key?` has been removed in #1318. This means that
`supports_primary_key?` is no longer used in the internal and Active
Record doesn't work without `primary_key` is implemented (all adapters
must implement `primary_key`).
Closes #27977
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These files are not using `strip_heredoc`.
Closes #27976
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So queries are not run against the previous table name.
Closes #27953
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This was never really intended to work (at least not without calling
`define_attribute_methods`, which is less common with Active Record). As
we move forward the intention is to require the use of `attribute` over
`attr_accessor` for more complex model behavior both on Active Record
and Active Model, so this behavior is deprecated.
Fixes #27956.
Close #27963.
[Alex Serban & Sean Griffin]
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Currently schema dumper lost the unsigned option when primary key is
defined as bigint with unsigned. This commit fixes the issue.
Closes #27960
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kenta-s/add-methods-back-to-array-delegation-from-ar-relation
Delegate `to_sentence` and `to_fomatted_s` to `records`
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This reverts commit d6529af2954a67bd57fda45286fa9cfd0ff6b5ac.
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primary_keys(table) needs to query various metadata tables in Postgres to
determine the primary key for the table. Previously, it did so using a
complex common table expression against pg_constraint and pg_attribute.
This patch simplifies the query by joining pg_index against pg_attribute
instead of going through pg_constraint. This avoids an expensive unnest,
window function query, and common table expression.
EXPLAINing these queries in Postgres against a database with a single
table with a composite primary key shows a 66% reduction in the plan and
execute latencies. This is significant during application startup time,
especially against very large schemas, where these queries would be even
slower and more numerous.
Closes #27949
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Column options are passed as an hash args then used as `options` hash in
`add_column_options!`. Converting args to attributes is inconvinient for
using options as an hash.
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Allow ActiveRecord::Base.as_json to accept a frozen Hash
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Deprecate locking of dirty records
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This reverts commit 28977f1fa3d7b15c1608174a165e60b71ddf3995.
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kamipo/pk_and_ref_columns_should_be_identical_type
`primary_key` and `references` columns should be identical type
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Follow up to #26266.
The default type of `primary_key` and `references` were changed to
`bigint` since #26266. But legacy migration and sqlite3 adapter should
keep its previous behavior.
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kamipo/decouple_building_arel_ast_for_uniqueness_validator
Decouple the building Arel ASTs for uniqueness validator
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These methods are obviously for internal use.
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Currently uniqueness validator is coupled with building Arel ASTs.
This commit extracts `WhereClauseFactory#build_for_case_sensitive` for
decouple the building Arel ASTs.
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If select clause is specified and last column has a column alias,
additional column alias causes a statement invalid.
Add test coverage for counting a single column with NULL values.
Fixes #27676, #27682, and #27705.
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Restore the behaviour of the compatibility layer for integer-like PKs
* kamipo/fix_mysql_pk_dumping_correctly:
Restore custom primary key tests lost at #26266
Restore the behaviour of the compatibility layer for integer-like PKs
Correctly dump integer-like primary key with default nil
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The PR #27384 changed migration compatibility behaviour.
```ruby
class CreateMasterData < ActiveRecord::Migration[5.0]
def change
create_table :master_data, id: :integer do |t|
t.string :name
end
end
end
```
Previously this migration created non-autoincremental primary key
expected. But after the PR, the primary key changed to autoincremental,
it is unexpected.
This change restores the behaviour of the compatibility layer.
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The PR #27384 changed integer-like primary key to be autoincrement
unless an explicit default. This means that integer-like primary key is
restored as autoincrement unless dumping the default nil explicitly.
We should dump integer-like primary key with default nil correctly.
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`ColumnDumper#migration_keys` was extracted to customize keys for
standardized column arguments widths. But the feature was removed in
df84e98. The internal method is no longer used for that.
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When the association's primary key is manually set as a symbol and called with an array of strings, CollectionAssociation#ids_writer
fails to cast the ids to integers. This is because
AssociationReflection#association_primary_key_type and
ThroughReflection#association_primary_key_type return the incorrect
type, since ModelSchema.type_for_attribute only accepts a string. The
result is an ActiveRecord::RecordNotFound error.
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MySQL generated columns: https://dev.mysql.com/doc/refman/5.7/en/create-table-generated-columns.html
MariaDB virtual columns: https://mariadb.com/kb/en/mariadb/virtual-computed-columns/
Declare virtual columns with `t.virtual name, type: …, as: "expression"`.
Pass `stored: true` to persist the generated value (false by default).
Example:
create_table :generated_columns do |t|
t.string :name
t.virtual :upper_name, type: :string, as: "UPPER(name)"
t.virtual :name_length, type: :integer, as: "LENGTH(name)", stored: true
t.index :name_length # May be indexed, too!
end
Closes #22589
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