Class: DatastaxRails::Cql::Delete
- Defined in:
- lib/datastax_rails/cql/delete.rb
Overview
Generates CQL to delete a record from Cassandra
Instance Method Summary collapse
- #columns(columns) ⇒ Object
-
#initialize(klass, key) ⇒ Delete
constructor
A new instance of Delete.
- #timestamp(timestamp) ⇒ Object
- #to_cql ⇒ Object
Methods inherited from Base
Constructor Details
#initialize(klass, key) ⇒ Delete
Returns a new instance of Delete.
5 6 7 8 9 10 11 |
# File 'lib/datastax_rails/cql/delete.rb', line 5 def initialize(klass, key) @klass = klass @key = key @timestamp = nil @columns = [] super end |
Instance Method Details
#columns(columns) ⇒ Object
13 14 15 16 |
# File 'lib/datastax_rails/cql/delete.rb', line 13 def columns(columns) @columns = columns self end |
#timestamp(timestamp) ⇒ Object
18 19 20 21 |
# File 'lib/datastax_rails/cql/delete.rb', line 18 def () @timestamp = self end |
#to_cql ⇒ Object
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 |
# File 'lib/datastax_rails/cql/delete.rb', line 23 def to_cql @values = [] stmt = "DELETE #{@columns.join(',')} FROM #{@klass.column_family} " stmt << "AND TIMESTAMP #{@timestamp} " if @timestamp conditions = [] @key.each do |col, val| conditions << "\"#{col}\" = ?" @values << val end stmt << "WHERE #{conditions.join(' AND ')}" stmt end |