Class: Cassanity::ArgumentGenerators::ColumnFamilyUpdate

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

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ ColumnFamilyUpdate

Internal



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# File 'lib/cassanity/argument_generators/column_family_update.rb', line 10

def initialize(args = {})
  @using_clause = args.fetch(:using_clause) { UsingClause.new }
  @set_clause   = args.fetch(:set_clause)   { SetClause.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
:set - The Hash of data to actually update
:where - The Hash of options to use to filter the update
:using - The Hash of options for the query ie: consistency, ttl,
         and timestamp (optional).

Examples

call({
  name: 'apps',
  set: {
    name: 'GitHub',
  },
  where: {
    :id => '1',
  }
})

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

bound values.



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# File 'lib/cassanity/argument_generators/column_family_update.rb', line 39

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

  variables = []

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

  cql = "UPDATE #{name}"

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

  set_cql, *set_variables = @set_clause.call(set: set)
  cql << set_cql
  variables.concat(set_variables)

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

  [cql, *variables]
end