metamaps--metamaps/app/models/item.rb

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class Item < ActiveRecord::Base
include ItemsHelper
belongs_to :user
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has_many :synapses1, :class_name => 'Synapse', :foreign_key => 'node1_id' #, :conditions => {:category => 'Item'}
has_many :synapses2, :class_name => 'Synapse', :foreign_key => 'node2_id' #, :conditions => {:category => 'Item'}
has_many :items1, :through => :synapses2, :source => :item1
has_many :items2, :through => :synapses1, :source => :item2
def synapses
synapses1 + synapses2
end
def relatives
items1 + items2
end
belongs_to :item_category
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def self_as_json
Jbuilder.encode do |json|
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@itemdata = Hash.new
@itemdata['$desc'] = self.desc
@itemdata['$link'] = self.link
@itemdata['$itemcatname'] = self.item_category.name
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json.data @itemdata
json.id self.id
json.name self.name
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end
end
#build a json object of everything connected to a specified node
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def map_as_json
Jbuilder.encode do |json|
@items = network(self,nil)
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json.array!(@items) do |item|
json.adjacencies item.synapses2.delete_if{|synapse| not @items.include?(Item.find_by_id(synapse.node1_id))} do |json, synapse|
json.nodeTo synapse.node1_id
json.nodeFrom synapse.node2_id
@synapsedata = Hash.new
@synapsedata['$desc'] = synapse.desc
@synapsedata['$category'] = synapse.category
json.data @synapsedata
end
@itemdata = Hash.new
@itemdata['$desc'] = item.desc
@itemdata['$link'] = item.link
@itemdata['$itemcatname'] = item.item_category.name
json.data @itemdata
json.id item.id
json.name item.name
end
end
end
def all_as_json
Jbuilder.encode do |json|
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@items = Item.all
json.array!(@items) do |item|
json.adjacencies item.synapses2.delete_if{|synapse| not @items.include?(Item.find_by_id(synapse.node1_id))} do |json, synapse|
json.nodeTo synapse.node1_id
json.nodeFrom synapse.node2_id
@synapsedata = Hash.new
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@synapsedata['$desc'] = synapse.desc
@synapsedata['$category'] = synapse.category
json.data @synapsedata
end
@itemdata = Hash.new
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@itemdata['$desc'] = item.desc
@itemdata['$link'] = item.link
@itemdata['$itemcatname'] = item.item_category.name
json.data @itemdata
json.id item.id
json.name item.name
end
end
end
end