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194b9650
编写于
12月 20, 2014
作者:
V
Vijay Dev
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pass over the autoloading guide [ci skip]
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guides/source/constant_autoloading_and_reloading.md
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Constant Autoloading and Reloading
==================================
Autoloading and Reloading Constants
==================================
=
This guide documents how constant autoloading and reloading works.
...
...
@@ -186,8 +186,8 @@ Project.name # => "Project"
```
Constant assignment has a special rule to make that happen: if the object
being assigned is an anonymous class or module, Ruby sets
its name to be the
one
the constant.
being assigned is an anonymous class or module, Ruby sets
the object's name to
the name of
the constant.
INFO. From then on, what happens to the constant and the instance does not
matter. For example, the constant could be deleted, the class object could be
...
...
@@ -221,7 +221,7 @@ assignment.
Thus, when one informally says "the
`String`
class", that really means: the
class object stored in the constant called "String" in the class object stored
in the
`Object`
constant.
`String`
is otherwise an ordinary Ruby constant and
everything related to constants
applies to it, resolution algorithms, etc
.
everything related to constants
such as resolution algorithms applies to it
.
Likewise, in the controller
...
...
@@ -270,7 +270,7 @@ In particular, `Colors::RED` is totally unrelated to any other `RED` constant
that may live in any other class or module object. If there were any, they
would have separate entries in their respective constant tables.
P
ut
special attention in the previous paragraphs to the distinction between
P
ay
special attention in the previous paragraphs to the distinction between
class and module objects, constant names, and value objects associated to them
in constant tables.
...
...
@@ -446,7 +446,7 @@ default it contains:
Also, this collection is configurable via
`config.autoload_paths`
. For example,
`lib`
was in the list years ago, but no longer is. An application can opt-in
throw
ing this to
`config/application.rb`
:
by add
ing this to
`config/application.rb`
:
```
ruby
config
.
autoload_paths
+=
"
#{
Rails
.
root
}
/lib"
...
...
@@ -889,7 +889,7 @@ end
### Autoloading and STI
Single Table Inheritance (STI) is a feature of Active Record that e
asi
es
Single Table Inheritance (STI) is a feature of Active Record that e
nabl
es
storing a hierarchy of models in one single table. The API of such models is
aware of the hierarchy and encapsulates some common needs. For example, given
these classes:
...
...
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