Class: Cassanity::ArgumentGenerators::ColumnFamilyDelete

Inherits:
Object
  • Object
show all
Defined in:
lib/cassanity/argument_generators/column_family_delete.rb

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ ColumnFamilyDelete

Internal



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# File 'lib/cassanity/argument_generators/column_family_delete.rb', line 9

def initialize(args = {})
  @using_clause = args.fetch(:using_clause) { UsingClause.new }
  @where_clause = args.fetch(:where_clause) { WhereClause.new }
end

Instance Method Details

#call(args = {}) ⇒ Object

Internal



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# File 'lib/cassanity/argument_generators/column_family_delete.rb', line 15

def call(args = {})
  name    = args.fetch(:column_family_name)
  where   = args.fetch(:where)
  columns = args.fetch(:columns) { [] }
  using   = args[:using]

  if (keyspace_name = args[:keyspace_name])
    name = "#{keyspace_name}.#{name}"
  end

  column_clause, variables = '', []
  columns ||= []

  cols = []
  [columns].flatten.each do |c|
    if Hash === c
      column_name = c.keys.first
      keys = c.values.first
      [keys].flatten.each do |k| 
        cols << "#{column_name}[?]"
        variables << k
      end
    elsif Cassanity::CollectionItem === c
      cols << "#{c.value}[?]"
      variables << c.key
    else
      cols << c
    end
  end
  column_clause = " #{cols.join(', ')}".rstrip

  cql = "DELETE#{column_clause} FROM #{name}"

  using_cql, *using_variables = @using_clause.call(using: using)
  cql << using_cql
  variables.concat(using_variables)

  where_cql, *where_variables = @where_clause.call(where: where)
  cql << where_cql
  variables.concat(where_variables)

  [cql, *variables]
end