Module: Spider::Model::List::MapperMethods

Defined in:
lib/spiderfw/model/mixins/list.rb

Instance Method Summary collapse

Instance Method Details

#before_delete(objects) ⇒ Object 



50
51
52
53
54
55
56
57
58
59
 
# File 'lib/spiderfw/model/mixins/list.rb', line 50

def before_delete(objects)
    @model.lists.each do |list_el|
        objects.each do |obj|
            cond = get_list_condition(list_el, obj)
            val = obj.get(list_el)
            move_down_list(list_el.name, val, nil, cond) if val
        end
    end
    super(objects)
end

#before_save(obj, mode) ⇒ Object 



16
17
18
19
20
21
22
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
 
# File 'lib/spiderfw/model/mixins/list.rb', line 16

def before_save(obj, mode)
    return super if obj.embedder && storage.supports?(:embedding)
    obj.class.lists.each do |l|
        next if (!check_list_condition(l, obj))
        cond = get_list_condition(l, obj)
        cur = obj.get(l.name)
        obj.set(l.name, max(l.name, cond) + 1) unless cur
    end
    if (obj.list_mixin_modified_elements)
        obj.list_mixin_modified_elements.each do |name, old|
            if (!check_list_condition(name, obj))
                obj.set(name, nil)
                next
            end
            cond = get_list_condition(name, obj)
            new_val = nil
            obj.save_mode do
                new_val = obj.get(name)
            end
            new_val ||= max(name, cond) + 1
            if (!old)
                move_up_list(name, new_val, nil, cond)
            else
                if (new_val < old)
                    move_up_list(name, new_val, old-1, cond)
                else
                    move_down_list(name, old+1, new_val, cond)
                end
            end
        end
    end
    super(obj, mode)
end

#check_list_condition(element, obj) ⇒ Object 



87
88
89
90
91
92
93
 
# File 'lib/spiderfw/model/mixins/list.rb', line 87

def check_list_condition(element, obj)
    element = @model.elements[element] unless element.is_a?(Element)
    l_check = element.attributes[:check_list_condition]
    return true unless l_check
    return l_check.call(obj)

end

#get_list_condition(element, obj) ⇒ Object 



77
78
79
80
81
82
83
84
85
 
# File 'lib/spiderfw/model/mixins/list.rb', line 77

def get_list_condition(element, obj)
    element = @model.elements[element] unless element.is_a?(Element)
    l_cond = element.attributes[:list_condition]
    return nil unless l_cond
    cond = l_cond.call(obj)
    cond = Condition.new(cond) unless cond.is_a?(Condition)
    preprocess_condition(cond)
    return cond
end

#move_down_list(element_name, from, to = nil, condition = nil) ⇒ Object 



69
70
71
72
73
74
75
 
# File 'lib/spiderfw/model/mixins/list.rb', line 69

def move_down_list(element_name, from, to=nil, condition=nil)
    expr = ":#{element_name} - 1"
    cond = condition || Condition.and
    cond.set(element_name, '>=', from)
    cond.set(element_name, '<=', to) if to
    bulk_update({element_name => Spider::QueryFuncs::Expression.new(expr)}, cond)
end

#move_up_list(element_name, from, to = nil, condition = nil) ⇒ Object 



61
62
63
64
65
66
67
 
# File 'lib/spiderfw/model/mixins/list.rb', line 61

def move_up_list(element_name, from, to=nil, condition=nil)
    expr = ":#{element_name} + 1"
    cond = condition || Condition.and
    cond.set(element_name, '>=', from)
    cond.set(element_name, '<=', to) if to
    bulk_update({element_name => Spider::QueryFuncs::Expression.new(expr)}, cond)
end