Class: ActiveRecord::PLSQL::PipelinedRelation

Inherits:
Relation
  • Object
show all
Defined in:
lib/active_record/plsql/pipelined_relation.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#pipelined_arguments_values ⇒ Object

Returns the value of attribute pipelined_arguments_values.



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# File 'lib/active_record/plsql/pipelined_relation.rb', line 3

def pipelined_arguments_values
  @pipelined_arguments_values
end

Instance Method Details

#bind_pipelined_arguments(values) ⇒ Object 



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# File 'lib/active_record/plsql/pipelined_relation.rb', line 20

def bind_pipelined_arguments(values)
  relation = clone
  if values.is_a?(Hash)
    arguments_values = values.values_at(*pipelined_arguments_names.map(&:to_sym))
    relation.bind_values += pipelined_arguments.zip(arguments_values)
  else
    relation.where_values += values
  end
  relation
end

#bind_values=(vals) ⇒ Object

Safe arguments binding



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# File 'lib/active_record/plsql/pipelined_relation.rb', line 52

def bind_values=(vals)
  if @klass.pipelined? && (pos = pipelined_arguments_binds_pos)
    vals = vals.map(&:dup)
    merge_pipelined_arguments(pos, vals)
    super(vals)
  else
    super
  end
end

#exec_queries ⇒ Object 



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# File 'lib/active_record/plsql/pipelined_relation.rb', line 62

def exec_queries
  return super unless @klass.pipelined? && pipelined_arguments.any?
  return @records if loaded?
  super
  return @records if @records.empty?

  pos = pipelined_arguments_binds_pos
  found_by_arguments = @bind_values[pos...(pos + pipelined_arguments.size)]
  # save arguments for easy reloading
  @records.each {|record| record.found_by_arguments = found_by_arguments}
  @records
end

#merge_pipelined_arguments(pos, values) ⇒ Object 



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# File 'lib/active_record/plsql/pipelined_relation.rb', line 31

def merge_pipelined_arguments(pos, values)
  new_values_pos = pos + pipelined_arguments.size
  exist_args = values[pos...new_values_pos]
  new_values = values[new_values_pos..-1]
  new_args_pos = pipelined_arguments_binds_pos(new_values)
  # return if there are no new argument values
  return unless new_args_pos
  new_arguments = new_values[new_args_pos...(new_args_pos + pipelined_arguments.size)]
  # overriding nil arguments
  new_arguments.each_with_index {|val, idx| exist_args[idx][1] ||= val[1]}
  # exclude new arguments
  values[(new_values_pos + new_args_pos)...(new_values_pos + new_args_pos + pipelined_arguments.size)] = nil
  # drop nil
  values.compact!
end

#pipelined_arguments_binds_pos(binds = @bind_values) ⇒ Object 



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# File 'lib/active_record/plsql/pipelined_relation.rb', line 47

def pipelined_arguments_binds_pos(binds = @bind_values)
  binds.index {|(col,_)| col.name == pipelined_arguments.first.name}
end

#where(opts, *rest) ⇒ Object 



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# File 'lib/active_record/plsql/pipelined_relation.rb', line 5

def where(opts, *rest)
  return super unless @klass.pipelined? && pipelined_arguments.any?

  pipelined_args = pipelined_arguments_names.map(&:to_sym)
  opts = normalize_arguments_conditions(opts, pipelined_args)
  return super if opts.blank?

  relation = bind_pipelined_arguments(opts)

  opts.reject! {|k| pipelined_args.include?(k)}
  # bind rest of arguments
  relation.where_values += build_where(opts, rest)
  relation
end