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Merge pull request #31971 from ydakuka/patch-1

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Change structure in the AS core extensions guide [ci skip]
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Rafael França 2018-02-12 15:37:46 -05:00 committed by GitHub
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18
guides/source/active_support_core_extensions.md
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@ -925,6 +925,15 @@ The macros `cattr_reader`, `cattr_writer`, and `cattr_accessor` are analogous to
```ruby
class MysqlAdapter < AbstractAdapter
# Generates class methods to access @@emulate_booleans.
cattr_accessor :emulate_booleans
end
```
Also, you can pass a block to `cattr_*` to set up the attribute with a default value:
```ruby
class MysqlAdapter < AbstractAdapter
# Generates class methods to access @@emulate_booleans with default value of true.
cattr_accessor :emulate_booleans, default: true
end
```
@ -941,15 +950,6 @@ end
we can access `field_error_proc` in views.
Also, you can pass a block to `cattr_*` to set up the attribute with a default value:
```ruby
class MysqlAdapter < AbstractAdapter
# Generates class methods to access @@emulate_booleans with default value of true.
cattr_accessor :emulate_booleans, default: true
end
```
The generation of the reader instance method can be prevented by setting `:instance_reader` to `false` and the generation of the writer instance method can be prevented by setting `:instance_writer` to `false`. Generation of both methods can be prevented by setting `:instance_accessor` to `false`. In all cases, the value must be exactly `false` and not any false value.
```ruby