Class: Rom::Dynamo::Dataset

Inherits:
Object
  • Object
show all
Defined in:
lib/rom/dynamo/relation.rb

Direct Known Subclasses

GlobalIndexDataset

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, ddb, conditions = nil) ⇒ Dataset

Returns a new instance of Dataset.



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# File 'lib/rom/dynamo/relation.rb', line 23

def initialize(name, ddb, conditions = nil)
  @name, @connection = name, ddb
  @conditions = conditions || {}
end

Instance Attribute Details

#connection ⇒ Object (readonly) Also known as: ddb

Returns the value of attribute connection.



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# File 'lib/rom/dynamo/relation.rb', line 20

def connection
  @connection
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/rom/dynamo/relation.rb', line 20

def name
  @name
end

Instance Method Details

#delete(hash) ⇒ Object 



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# File 'lib/rom/dynamo/relation.rb', line 57

def delete(hash)
  connection.delete_item({
    table_name: name,
    key: hash_to_key(hash),
    expected: to_expected(hash),
  })
end

#each(&block) ⇒ Object

READ #############



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# File 'lib/rom/dynamo/relation.rb', line 29

def each(&block)
  each_item({
    consistent_read: true,
    key_conditions: @conditions
  }, &block)
end

#index_restrict(index, query) ⇒ Object 



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# File 'lib/rom/dynamo/relation.rb', line 43

def index_restrict(index, query)
  conds = query_to_conditions(query)
  conds = @conditions.merge(conds)
  dup_as(GlobalIndexDataset, index: index, conditions: conds)
end

#insert(hash) ⇒ Object

WRITE #############



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# File 'lib/rom/dynamo/relation.rb', line 50

def insert(hash)
  connection.put_item({
    table_name: name,
    item: hash
  })
end

#restrict(query = nil) ⇒ Object 



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# File 'lib/rom/dynamo/relation.rb', line 36

def restrict(query = nil)
  return self if query.nil?
  conds = query_to_conditions(query)
  conds = @conditions.merge(conds)
  dup_as(Dataset, conditions: conds)
end