Module: EasyMongoidTag::ClassMethods

Defined in:
lib/easy_mongoid_tag/tag.rb

Instance Method Summary collapse

Instance Method Details

#easy_tag(tag_name) ⇒ Object

生成 标签field @param



23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/easy_mongoid_tag/tag.rb', line 23

def easy_tag tag_name
  field_name = Helper.field_name(tag_name)

  field field_name, type: Array
  self.tag_items << tag_name
  index({ field_name => 1 })

  tag_class = generate_tag_class(tag_name)

  self.instance_eval do
    define_method Helper.tags_method_name(tag_name) do
      tag_class.find(*self.send(field_name))
    end
  end

  before_validation do |doc|
    doc.send("#{field_name}=",
             doc[tag_name].map do |title_or_object_id|
               if title_or_object_id.is_a? Moped::BSON::ObjectId
                 title_or_object_id
               else
                 title_or_object_id.strip!
                 tag = tag_class.where(title: title_or_object_id).first
                 if tag
                   tag.id
                 else
                   tag = tag_class.new(title: title_or_object_id)
                   tag.save ? tag.id : nil
                 end
               end
             end.select(&:present?)) if doc[tag_name] 
  end
end

#easy_tags(*tag_names) ⇒ Object 



57
58
59
60
61
 
# File 'lib/easy_mongoid_tag/tag.rb', line 57

def easy_tags *tag_names
  tag_names.each do |tag_name|
    easy_tag tag_name
  end
end

#generate_tag_class(tag_name) ⇒ Object

生成标签类



65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
 
# File 'lib/easy_mongoid_tag/tag.rb', line 65

def generate_tag_class tag_name

  tag_class_name = Helper.tag_class_name(tag_name)
  field_name     = Helper.field_name(tag_name)

  if Helper.class_existed?(tag_class_name)
    raise(RuntimeError, "Class #{tag_class_name} already existed!")
    return
  else
    # model 类的
    main_class_name = self.name
    Object.const_set(tag_class_name,
                     Class.new do
                       include Mongoid::Document
                       include Mongoid::Timestamps::Created

                       store_in collection: tag_class_name.tableize

                       field :title, type: String
                       index({ title: 1 }, { unique: true })

                       define_method main_class_name.downcase.pluralize do
                         Object.const_get(main_class_name).where(field_name => self.id)
                       end

                       class << self 
                         def search key_word
                           self.any_of(title: /.*#{key_word}.*/)
                         end
                       end

                       before_validation do |record|
                         record.title = record.title.strip
                       end
                       
                       after_destroy do |record|
                         record.send(main_class_name.downcase.pluralize).each do |model|
                           Object.const_get(main_class_name).skip_callback(:validation, :before)
                           model.send("#{field_name}=", model.send(field_name).reject{|t| t == record.id } )
                           model.save
                           Object.const_get(main_class_name).set_callback(:validation, :before)
                         end
                       end

            end)
  end
end