Module: Nifty::KeyValueStore::ModelExtension

Defined in:
lib/nifty/key_value_store/model_extension.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/nifty/key_value_store/model_extension.rb', line 5

def self.included(base)
  base.extend ClassMethods
end

Instance Method Details

#get_custom_values_for(group) ⇒ Object

Get the values for a given group as a hash from the database without caching



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# File 'lib/nifty/key_value_store/model_extension.rb', line 53

def get_custom_values_for(group)
  nifty_key_value_pairs.where(:group => group).inject({}) do |hash, value|
    hash[value.name] = value.value
    hash
  end
end

#save_custom_values_to_db ⇒ Object

Save all custom values in the appropriate methods to the



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# File 'lib/nifty/key_value_store/model_extension.rb', line 61

def save_custom_values_to_db
  # get the existing joins ready
  existing_joins = self.nifty_key_value_pairs
  # go through all groups
  self.class.key_value_stores.each do |group|
    db_values     = get_custom_values_for(group)
    local_values  = self.send(group).delete_if { |k,v| v.blank? }
    
    # remove any keys which no longer exist
    keys_to_remove = db_values.keys - local_values.keys
    self.nifty_key_value_pairs.where(:group => group, :name => keys_to_remove).destroy_all unless keys_to_remove.empty?
    
    # add/update all remaining keys
    local_values.each do |key, value|
      if existing_join = existing_joins.select { |j| j.group == group.to_s && j.name == key}.first
        existing_join.value = value
        existing_join.save
      else
        self.nifty_key_value_pairs.create(:group => group, :name => key, :value => value)
      end
    end
  end
end