You can try
class Post
end
Object.const_get("Post")
Which returns the Post
class
Вопрос
I have something like this:
string = "Post"
I would like to convert the string to a class name literal. I use eval like this to convert the string:
eval(string) #=> Post
Being a javaScript developer I try to avoid eval. Is there a better way of doing this in Ruby? Or is using eval the preferred way of handling this?
Решение
You can try
class Post
end
Object.const_get("Post")
Which returns the Post
class
Другие советы
Use Module.const_get
string = "Fixnum"
clazz = Object.const_get(string)
clazz.name # => "Fixnum"
If you are in a rails context, you can also use the `#constantize method on string
clazz = string.constantize # => Fixnum