Class: Volt::DataStore::MongoAdaptorServer

Inherits:
BaseAdaptorServer
  • Object
show all
Defined in:
app/mongo/lib/mongo_adaptor_server.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#db ⇒ Object (readonly)

Returns the value of attribute db.



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 20

def db
  @db
end

#mongo_db ⇒ Object (readonly)

Returns the value of attribute mongo_db.



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 20

def mongo_db
  @mongo_db
end

Instance Method Details

#adapter_version ⇒ Object 



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 151

def adapter_version
  ::Mongo::VERSION
end

#connected? ⇒ Boolean

check if the database can be connected to.

Returns:

  • (Boolean) —

    Boolean



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 24

def connected?
  begin
    db

    true
  rescue ::Mongo::Error => e
    false
  end
end

#delete(collection, query) ⇒ Object 



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 134

def delete(collection, query)
  if query.key?('id')
    query['_id'] = query.delete('id')
  end

  db[collection].delete_one(query)
end

#drop_collection(collection) ⇒ Object

remove the collection entirely



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 143

def drop_collection(collection)
  db[collection].drop
end

#drop_database ⇒ Object 



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 147

def drop_database
  db.database.drop
end

#insert(collection, values) ⇒ Object 



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 48

def insert(collection, values)
  db[collection].insert_one(values)
end

#query(collection, query) ⇒ Object 



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 82

def query(collection, query)
  if ENV['DB_LOG'] && collection.to_s != 'active_volt_instances'
    Volt.logger.info("Query: #{collection}: #{query.inspect}")
  end

  allowed_methods = %w(find skip limit sort)

  result = db[collection]

  query.each do |query_part|
    method_name, *args = query_part

    unless allowed_methods.include?(method_name.to_s)
      fail "`#{method_name}` is not part of a valid query"
    end

    args = args.map do |arg|
      if arg.is_a?(Hash)
        arg = arg.stringify_keys
      end
      arg
    end

    if method_name == 'find' && args.size > 0
      qry = args[0]
      to_mongo_id!(qry)
    end

    result = result.send(method_name, *args)
  end

  if result.is_a?(::Mongo::Collection::View)
    result = result.to_a.map do |hash|
      # Return id instead of _id
      to_volt_id!(hash)

      # Volt expects symbol keys
      hash.symbolize_keys
    end#.tap {|v| puts "QUERY: " + v.inspect }
  end

  values = Volt::DataTransformer.transform(result) do |value|
    if defined?(VoltTime) && value.is_a?(Time)
      value = VoltTime.from_time(value)
    else
      value
    end
  end

  values
end

#update(collection, values) ⇒ Object 



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# File 'app/mongo/lib/mongo_adaptor_server.rb', line 52

def update(collection, values)
  values = values.nested_stringify_keys
  values = Volt::DataTransformer.transform(values) do |value|
    if defined?(VoltTime) && value.is_a?(VoltTime)
      value.to_time
    else
      value
    end
  end

  to_mongo_id!(values)
  # TODO: Seems mongo is dumb and doesn't let you upsert with custom id's
  begin
    db[collection].insert_one(values)
  rescue => error
    # Really mongo client?
    msg = error.message
    if (msg[/^E11000/] || msg[/^insertDocument :: caused by :: 11000 E11000/]) && msg['$_id_']
      # Update because the id already exists
      update_values = values.dup
      id = update_values.delete('_id')
      db[collection].update_one({ '_id' => id }, update_values)
    else
      return { error: error.message }
    end
  end

  nil
end