rails4 activeRecord错误

Question

SyntaxError: C:/Users/NEBELYN/Desktop/cms/simple_cms/app/models/subject.r    
b:3: syntax error, unexpected =>, expecting ')'                          
    scope :visible, lambda { where (:visible => true) }              
                                               ^                     
C:/Users/NEBELYN/Desktop/cms/simple_cms/app/models/subject.rb:4: syntax e
rror, unexpected =>, expecting ')'                                       
    scope :invisible, lambda { where (:visible => false) }           
                                                 ^                   
C:/Users/NEBELYN/Desktop/cms/simple_cms/app/models/subject.rb:10: syntax 
error, unexpected keyword_end, expecting '}'                             
    from C:/Ruby200/lib/ruby/gems/2.0.0/gems/activesupport-4.0.2/lib/
active_support/dependencies.rb:424:in `load'                             
    from C:/Ruby200/lib/ruby/gems/2.0.0/gems/activesupport-4.0.2/lib/
active_support/dependencies.rb:424:in `block in load_file'               
    from C:/Ruby200/lib/ruby/gems/2.0.0/gems/activesupport-4.0.2/lib/
active_support/dependencies.rb:616:in `new_constants_in'                 

当我的subject.rb文件看起来像这样

 class Subject < ActiveRecord::Base

scope :visible, lambda { where (:visible => true) }
scope :invisible, lambda { where (:visible => false) }
scope :sorted, lambda {order("subjects.position ASC")}
scope :newest_first, lambda{ order("subjects.created_at DESC")}
scope :search. lambda { |query|
    where (["name like ?", "%#{query}%"])
}

当我在rails console“ Subject.visible”上运行此命令时结束

Answer 1

你不能把之间的空间where和( 。

scope :visible, lambda { where (:visible => true) }   # bad
scope :visible, lambda { where(:visible => true) }    # good

Answer 2

删除where和open paranthesis之间的空间

class Subject < ActiveRecord::Base

scope :visible, lambda { where(:visible => true) }
scope :invisible, lambda { where(:visible => false) }
scope :sorted, lambda {order("subjects.position ASC")}
scope :newest_first, lambda{ order("subjects.created_at DESC")}
scope :search. lambda { |query|
    where(["name like ?", "%#{query}%"])
}