Method: Spider::Model::IdentityMapper#get

Defined in:
lib/spiderfw/model/identity_mapper.rb

#get(model, values = nil, set_loaded = false) ⇒ Object

Get an instance of model with given values. Values must contain all of model’s primary keys. If an object with the same primary keys is found, it will be used; otherwise, a new instance will be created. In any case, the given values will be set on the object, before it is returned.

FIXME: refactor avoiding set_loaded



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# File 'lib/spiderfw/model/identity_mapper.rb', line 33

def get(model, values=nil, set_loaded=false)
    
    if !values && model.is_a?(BaseModel)
        curr = has?(model)
        return curr ? curr : put(model)
    end
    
    @objects[model] ||= {}
    pks = {}
    has_pks = false
    model.primary_keys.each do |k| 
        # dereference integrated primary keys
        v = (k.integrated? && values[k.integrated_from.name]) ? 
            values[k.integrated_from.name].get(k.integrated_from_element) :
            values[k.name]
        has_pks = true if v
        pks[k.name] = model.prepare_value(k, v)
    end
    orig_pks = pks.clone
    normalize_pks(model, pks)
    unless has_pks
        raise IdentityMapperException, "Can't get #{model} from IdentityMapper without all primary keys, #{values.inspect} given"
    end
    pks.extend(HashComparison)
    current = @objects[model][pks]
    obj = nil
    if current
        obj = current
    else
#                Spider.logger.debug("GETTING NEW #{model} FROM #{pks.inspect}")
        obj = model.new(orig_pks)
        #@objects[model][pks] = obj
    end
    # obj = (@objects[model][pks] ||= model.new(pks))
    pks.each{ |k, v| obj.element_loaded(k) }
    values.reject{|k,v| model.elements[k].primary_key? }.each do |k, v|
        v = get(v) if v.is_a?(BaseModel)
        if set_loaded
            obj.set_loaded_value(k, v)
        else
            obj.set(k, v)
        end
    end
#            Spider::Logger.debug("RETURNING #{obj.class} #{obj.object_id}")
    return obj
end