class DatastaxRails::Cql::Delete
Generates CQL to delete a record from Cassandra
Public Class Methods
new(klass, key)
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Calls superclass method
DatastaxRails::Cql::Transactions::new
# File lib/datastax_rails/cql/delete.rb, line 5 def initialize(klass, key) @klass = klass @key = key @timestamp = nil @columns = [] super end
Public Instance Methods
columns(columns)
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# File lib/datastax_rails/cql/delete.rb, line 13 def columns(columns) @columns = columns self end
timestamp(timestamp)
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# File lib/datastax_rails/cql/delete.rb, line 18 def timestamp(timestamp) @timestamp = timestamp self end
to_cql()
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# 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