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Moves the definition of an association to the top of the page. I am just starting to learn Rails, and having this definition at the top instead of in the second section would be really useful.
Updates the Types of Associations section for clarity. Moves the list of associations before the explanation.
Links to wikipedia articles on Primary and Foreign keys.
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javascript => JavaScript
JavaScript is spelled with a capital J and S.
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It was deprecated in https://github.com/rails/rails/pull/19135.
We're now favoring `public_file_server.headers`.
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docrails is a private repository now to avoid pull requests to it.
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Should use `public_file_server.enabled` instead.
Clarified that static files will be served from the public directory, where it made sense.
Also removed occurrence of the deprecated `static_cache_control`.
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https://twitter.com/avdi/status/660141673993777156
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As discussed in the minitest-spec-rails issue (http://git.io/vlHxx) Rails uses setup/teardown callbacks. Defining `setup` or `teardown` methods vs. blocks will yield inconsistent behavior in the callback chain.
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the default scope
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https://github.com/rails/rails/commit/e768c519fb6015e00961702a5165c6dab548a954 bang version produces `KeyError` [ci skip]
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skip]
`A UNIQUE` we pronounce URL as 'yu-ni-k’. We use this everywhere. So, be consistent with it.
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added ActiveRecord::Relation#outer_joins
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Example:
User.left_outer_joins(:posts)
=> SELECT "users".* FROM "users" LEFT OUTER JOIN "posts" ON "posts"."user_id" = "users"."id"
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* #uniq is an alias of #distinct
* #uniq will be deprecated, see: rails/rails@adfab2dcf4003ca564d78d4425566dd2d9cd8b4f
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Errors can be indexed with nested attributes
Close #8638
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`has_many` can now take `index_errors: true` as an
option. When this is enabled, errors for nested models will be
returned alongside an index, as opposed to just the nested model name.
This option can also be enabled (or disabled) globally through
`ActiveRecord::Base.index_nested_attribute_errors`
E.X.
```ruby
class Guitar < ActiveRecord::Base
has_many :tuning_pegs
accepts_nested_attributes_for :tuning_pegs
end
class TuningPeg < ActiveRecord::Base
belongs_to :guitar
validates_numericality_of :pitch
end
```
- Old style
- `guitar.errors["tuning_pegs.pitch"] = ["is not a number"]`
- New style (if defined globally, or set in has_many_relationship)
- `guitar.errors["tuning_pegs[1].pitch"] = ["is not a number"]`
[Michael Probber, Terence Sun]
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Reason: That one is an Oxford comma, as per our guidelines. See:
http://edgeguides.rubyonrails.org/api_documentation_guidelines.html#comma
This reverts commit f184cd34f9ef35ddf85a23c2fb02cc05d3fb26b3.
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We use one period after spaces, not two.
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Use Module.prepend instead of alias_method and unify behavior of all Numeric extensions
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alias_method
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Original:
* `config.active_record.belongs_to_required_by_default` is a boolean
value and controls whether `belongs_to` association is required by
default.
Modified version:
* `config.active_record.belongs_to_required_by_default` is a boolean
value and controls whether validation error is triggered by
default if `belongs_to` association is not present or not valid.
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activerecord guide: clarified roles of valid method and errors object [ci skip]
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Sure this is `destroy` method of PhotosController, but in this chapter
these methods which mapped by the router are called "action".
For example:
```ruby
get '/patients/:id', to: 'patients#show'
```
is described to dispatch "controller's `show` action".
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* adds/removes a few words
* removes an unnecessary comma
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If you can't start your queue, you won't process much. This change adds external links to the Queue backends that have Active Job specific docs.
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Add 'db/'; corrects structure.rb to structure.sql
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I added that *structure.sql* file can be used when *db:reset* is run.
*db:reset* tasks states *db:reset* loads database from *db/schema.rb*
or *db/structure.sql* depending on the configuration (although
*db/schema.rb* is the default), hence the change.
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Minor cleanup for form helpers guide
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This reverts commit afe672185d5eba95f387c46f855ae7a21ea69fa5.
Reason: This change was done by mistake. This option is at the `config`
object not in the `config.assets`.
See
https://github.com/rails/rails/blob/cfb371e96a2789790359ec1db779df490fd253d6/railties/lib/rails/application/configuration.rb#L16
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Correct spelling is "Esperanto":
https://en.wikipedia.org/wiki/Esperanto
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Fix typo in docs
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Change "parse_query" to "parse_nested_query"
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