ruby on rails 5 lambda syntax error, unexpected =>, expecting ')'

Question

I have a migration file create_subject (code of which is below), a Subject class contains scopes using lambda syntax. When I call Subject.visible, I get syntax errors.

class CreateSubjects < ActiveRecord::Migration[5.0]
  def up
    create_table :subjects do |t|
      t.string "name"
      t.integer "position"
      t.boolean "visible", :default=>false

      t.timestamps
    end
  end

  def down
    drop_table :subjects
  end
end

This is my Subject class

Console error log

irb(main):003:0> Subject.visible
SyntaxError: C:/Users/SS/Sites/simple_cms/app/models/subject.rb:3: syntax error, unexpected =>, expecting ')'
scope :visible, -> { where (:visible => true) }
                                   ^
C:/Users/SS/Sites/simple_cms/app/models/subject.rb:4: syntax error, unexpected =>, expecting ')'
scope :invisible, -> { where (:visible => false) }
                                     ^
C:/Users/SS/Sites/simple_cms/app/models/subject.rb:7: syntax error, unexpected '|'
scope :search, -> {|query| where (["name LIKE ?", "%#{query}%"]) }
                ^
C:/Users/SS/Sites/simple_cms/app/models/subject.rb:7: syntax error, unexpected ( arg, expecting keyword_do or '{' or '('
scope :search, -> {|query| where (["name LIKE ?", "%#{query}%"]) }

Michał Młoźniak · Accepted Answer · 2017-05-21 11:55:59Z

4

Do not put space before opening parenthesis when calling methods. It should be like this

class Subject < ApplicationRecord
  scope :visible, -> { where(:visible => true) }
  scope :invisible, -> { where(:visible => false) }
  scope :sorted, -> { order("position ASC") }
  scope :search, ->(query) { where(["name LIKE ?", "%#{query}%"]) }
  # and so on ...
end

edited May 21, 2017 at 11:55

answered May 21, 2017 at 10:21

Michał Młoźniak

5,5462 gold badges24 silver badges40 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

SU7 Over a year ago

(THANK YOU, for replying. Looks like most of the errors are fixed. BUT): irb(main):001:0> Subject.visible SyntaxError: C:/Users/SS/Sites/simple_cms/app/models/subject.rb:7: syntax error, unexpected '|' scope :search, -> {|query| where(["name LIKE ?", "%#{query}%"]) }

SU7 Over a year ago

I literally cant be more thankful to you sir @Michal. I felt like i've lost learning this language. Thank you so so very much...

Michał Młoźniak Over a year ago

@SafiUllah You can accept the answer if it solved your problem

Serjik · Accepted Answer · 2017-07-13 15:16:57Z

1

If you are going to put query in pipes |query| then use:

scope :search,lambda{|query| where(["name LIKE ?", "%#{query}%"]) }

instead of

scope :search, ->(query) { where(["name LIKE ?", "%#{query}%"]) }

answered Jul 13, 2017 at 15:16

Serjik

11.1k8 gold badges64 silver badges72 bronze badges

Collectives™ on Stack Overflow

ruby on rails 5 lambda syntax error, unexpected =>, expecting ')'

2 Answers 2

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related