Class: Datagrid::Filters::DynamicFilter

Inherits:
BaseFilter
  • Object
show all
Includes:
SelectOptions
Defined in:
lib/datagrid/filters/dynamic_filter.rb

Constant Summary collapse

EQUAL_OPERATION = 
'='
LIKE_OPERATION = 
'=~'
MORE_EQUAL_OPERATION = 
'>='
LESS_EQUAL_OPERATION = 
'<='
DEFAULT_OPERATIONS = 
[
  EQUAL_OPERATION,
  LIKE_OPERATION,
  MORE_EQUAL_OPERATION,
  LESS_EQUAL_OPERATION,
]
AVAILABLE_OPERATIONS = 
%w(= =~ >= <=)

Instance Attribute Summary

Attributes inherited from BaseFilter

#block, #grid_class, #name, #options

Instance Method Summary collapse

Methods included from SelectOptions

#include_blank, #prompt, #select

Methods inherited from BaseFilter

#allow_blank?, #allow_nil?, #apply, #default, #default_filter_block, #dummy?, #enabled?, form_builder_helper_name, #form_builder_helper_name, #format, #header, #multiple?, #parse, #separator, #supports_range?, #type

Constructor Details

#initialize ⇒ DynamicFilter

Returns a new instance of DynamicFilter.


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# File 'lib/datagrid/filters/dynamic_filter.rb', line 19

def initialize(*)
  super
  options[:select] ||= default_select
  options[:operations] ||= DEFAULT_OPERATIONS
  unless options.has_key?(:include_blank)
    options[:include_blank] = false
  end
end

Instance Method Details

#default_filter_where(scope, filter) ⇒ Object 


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# File 'lib/datagrid/filters/dynamic_filter.rb', line 39

def default_filter_where(scope, filter)
  field, operation, value = filter
  date_conversion = value.is_a?(Date) && driver.is_timestamp?(scope, field)

  return scope if field.blank? || operation.blank?
  unless operations.include?(operation)
    raise Datagrid::FilteringError, "Unknown operation: #{operation.inspect}. Available operations: #{operations.join(' ')}"
  end
  case operation
  when EQUAL_OPERATION
    if date_conversion
      value = Datagrid::Utils.format_date_as_timestamp(value)
    end
    driver.where(scope, field, value)
  when LIKE_OPERATION
    if column_type(field) == :string
      driver.contains(scope, field, value)
    else
      if date_conversion
        value = Datagrid::Utils.format_date_as_timestamp(value)
      end
      driver.where(scope, field, value)
    end
  when MORE_EQUAL_OPERATION
    if date_conversion
      value = value.beginning_of_day
    end
    driver.greater_equal(scope, field, value)
  when LESS_EQUAL_OPERATION
    if date_conversion
      value = value.end_of_day
    end
    driver.less_equal(scope, field, value)
  else
    raise Datagrid::FilteringError, "Unknown operation: #{operation.inspect}. Use filter block argument to implement operation"
  end
end

#operations ⇒ Object 


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# File 'lib/datagrid/filters/dynamic_filter.rb', line 77

def operations
  options[:operations]
end

#operations_select ⇒ Object 


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# File 'lib/datagrid/filters/dynamic_filter.rb', line 81

def operations_select
  operations.map do |operation|
    [I18n.t(operation, :scope => "datagrid.filters.dynamic.operations").html_safe, operation]
  end
end

#parse_values(filter) ⇒ Object 


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# File 'lib/datagrid/filters/dynamic_filter.rb', line 28

def parse_values(filter)
  field, operation, value = filter

  [field, operation, type_cast(field, value)]
end

#unapplicable_value?(filter) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/datagrid/filters/dynamic_filter.rb', line 34

def unapplicable_value?(filter)
  _, _, value = filter
  super(value)
end