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



9
10
11
12
 
# 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: Converts a Hash of arguments to CQL with bound variables.

args - The Hash of arguments to use.

:name - The String name of the column family
:where - The Hash of options to use to filter the delete
:columns - The Array of columns you would like to delete
           (default is all columns) (optional).
:using - The Hash of options for the query ie: consistency, ttl,
         and timestamp (default: {}) (optional).

Examples

call({
  name: 'apps',
  where: {
    id: '1',
  },
})

Returns Array where first element is CQL string and the rest are

bound values.



35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
 
# File 'lib/cassanity/argument_generators/column_family_delete.rb', line 35

def call(args = {})
  name    = args.fetch(: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 = '', []

  unless columns.empty?
    column_clause = " #{columns.join(', ')}"
  end

  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