Module: Aws::Record::ItemOperations::ItemOperationsClassMethods
- Included in:
- Aws::Record
- Defined in:
- lib/aws-record/record/item_operations.rb
Instance Method Summary collapse
-
#find(opts) ⇒ Aws::Record
Builds and returns an instance of your model.
-
#find_with_opts(opts) ⇒ Aws::Record
Note that
#find_with_opts
will pass through all options other than:key
unaltered to the underlying Aws::DynamoDB::Client#get_item request. - #tfind_opts(opts) ⇒ Object
-
#transact_check_expression(opts) ⇒ Hash
Allows you to build a “check” expression for use in transactional write operations.
-
#transact_find(opts) ⇒ OpenStruct
Provides a way to run a transactional find across multiple DynamoDB items, including transactions which get items across multiple actual or virtual tables.
-
#update(opts) ⇒ Object
Performs an Aws::DynamoDB::Client#update_item call immediately on the table, using the attribute key/value pairs provided.
Instance Method Details
#find(opts) ⇒ Aws::Record
Returns builds and returns an instance of your model.
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# File 'lib/aws-record/record/item_operations.rb', line 462 def find(opts) find_with_opts(key: opts) end |
#find_with_opts(opts) ⇒ Aws::Record
Note that #find_with_opts
will pass through all options other than :key
unaltered to the underlying Aws::DynamoDB::Client#get_item request. You should ensure that you have an aws-sdk gem version which supports the options you are including, and avoid adding options not recognized by the underlying client to avoid runtime exceptions.
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# File 'lib/aws-record/record/item_operations.rb', line 492 def find_with_opts(opts) key = opts.delete(:key) request_key = {} @keys.keys.each_value do |attr_sym| unless key[attr_sym] raise Errors::KeyMissing.new( "Missing required key #{attr_sym} in #{key}" ) end attr_name = attributes.storage_name_for(attr_sym) request_key[attr_name] = attributes.attribute_for(attr_sym). serialize(key[attr_sym]) end request_opts = { table_name: table_name, key: request_key }.merge(opts) resp = dynamodb_client.get_item(request_opts) if resp.item.nil? nil else build_item_from_resp(resp) end end |
#tfind_opts(opts) ⇒ Object
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# File 'lib/aws-record/record/item_operations.rb', line 384 def tfind_opts(opts) opts = opts.dup key = opts.delete(:key) request_key = {} @keys.keys.each_value do |attr_sym| unless key[attr_sym] raise Errors::KeyMissing.new( "Missing required key #{attr_sym} in #{key}" ) end attr_name = attributes.storage_name_for(attr_sym) request_key[attr_name] = attributes.attribute_for(attr_sym). serialize(key[attr_sym]) end # this is a :get item used by #transact_get_items, with the exception # of :model_class which needs to be removed before passing along opts[:key] = request_key opts[:table_name] = table_name { model_class: self, get: opts } end |
#transact_check_expression(opts) ⇒ Hash
Allows you to build a “check” expression for use in transactional write operations.
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# File 'lib/aws-record/record/item_operations.rb', line 364 def transact_check_expression(opts) # need to transform the key, and add the table name opts = opts.dup key = opts.delete(:key) check_key = {} @keys.keys.each_value do |attr_sym| unless key[attr_sym] raise Errors::KeyMissing.new( "Missing required key #{attr_sym} in #{key}" ) end attr_name = attributes.storage_name_for(attr_sym) check_key[attr_name] = attributes.attribute_for(attr_sym). serialize(key[attr_sym]) end opts[:key] = check_key opts[:table_name] = table_name opts end |
#transact_find(opts) ⇒ OpenStruct
Provides a way to run a transactional find across multiple DynamoDB items, including transactions which get items across multiple actual or virtual tables.
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# File 'lib/aws-record/record/item_operations.rb', line 437 def transact_find(opts) opts = opts.dup transact_items = opts.delete(:transact_items) global_transact_items = transact_items.map do |topts| tfind_opts(topts) end opts[:transact_items] = global_transact_items opts[:client] = dynamodb_client Transactions.transact_find(opts) end |
#update(opts) ⇒ Object
Performs an Aws::DynamoDB::Client#update_item call immediately on the table, using the attribute key/value pairs provided.
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# File 'lib/aws-record/record/item_operations.rb', line 539 def update(opts) key = {} updates = {} @keys.keys.each_value do |attr_sym| unless value = opts.delete(attr_sym) raise Errors::KeyMissing.new( "Missing required key #{attr_sym} in #{opts}" ) end attr_name = attributes.storage_name_for(attr_sym) key[attr_name] = attributes.attribute_for(attr_sym).serialize(value) end request_opts = { table_name: table_name, key: key } update_tuple = _build_update_expression(opts) unless update_tuple.nil? uex, exp_attr_names, exp_attr_values = update_tuple request_opts[:update_expression] = uex request_opts[:expression_attribute_names] = exp_attr_names request_opts[:expression_attribute_values] = exp_attr_values unless exp_attr_values.empty? end dynamodb_client.update_item(request_opts) end |