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module RailsAdmin
module Config
# Provides accessors and autoregistering of model's fields.
module HasFields
# Defines a configuration for a field.
def field(name, type = nil, add_to_section = true, &block)
field = _fields.detect { |f| name == f.name }
# some fields are hidden by default (belongs_to keys, has_many associations in list views.)
# unhide them if config specifically defines them
if field
field.show unless field.instance_variable_get("@#{field.name}_registered").is_a?(Proc)
end
# Specify field as virtual if type is not specifically set and field was not
# found in default stack
if field.nil? && type.nil?
field = (_fields << RailsAdmin::Config::Fields::Types.load(:string).new(self, name, nil)).last
# Register a custom field type if one is provided and it is different from
# one found in default stack
elsif type && type != (field.nil? ? nil : field.type)
if field
properties = field.properties
field = _fields[_fields.index(field)] = RailsAdmin::Config::Fields::Types.load(type).new(self, name, properties)
else
properties = abstract_model.properties.detect { |p| name == p.name }
field = (_fields << RailsAdmin::Config::Fields::Types.load(type).new(self, name, properties)).last
end
end
# If field has not been yet defined add some default properties
if add_to_section && !field.defined
field.defined = true
field.order = _fields.count(&:defined)
end
# If a block has been given evaluate it and sort fields after that
field.instance_eval(&block) if block
field
end
# configure a field without adding it.
def configure(name, type = nil, &block)
field(name, type, false, &block)
end
# include fields by name and apply an optionnal block to each (through a call to fields),
# or include fields by conditions if no field names
def include_fields(*field_names, &block)
if field_names.empty?
_fields.select { |f| f.instance_eval(&block) }.each do |f|
next if f.defined
f.defined = true
f.order = _fields.count(&:defined)
end
else
fields(*field_names, &block)
end
end
# exclude fields by name or by condition (block)
def exclude_fields(*field_names, &block)
block ||= proc { |f| field_names.include?(f.name) }
_fields.each { |f| f.defined = true } if _fields.select(&:defined).empty?
_fields.select { |f| f.instance_eval(&block) }.each { |f| f.defined = false }
end
# API candy
alias_method :exclude_fields_if, :exclude_fields
alias_method :include_fields_if, :include_fields
def include_all_fields
include_fields_if { true }
end
# Returns all field configurations for the model configuration instance. If no fields
# have been defined returns all fields. Defined fields are sorted to match their
# order property. If order was not specified it will match the order in which fields
# were defined.
#
# If a block is passed it will be evaluated in the context of each field
def fields(*field_names, &block)
return all_fields if field_names.empty? && !block
if field_names.empty?
defined = _fields.select(&:defined)
defined = _fields if defined.empty?
else
defined = field_names.collect { |field_name| _fields.detect { |f| f.name == field_name } }
end
defined.collect do |f|
unless f.defined
f.defined = true
f.order = _fields.count(&:defined)
end
f.instance_eval(&block) if block
f
end
end
# Defines configuration for fields by their type.
def fields_of_type(type, &block)
_fields.select { |f| type == f.type }.map! { |f| f.instance_eval(&block) } if block
end
# Accessor for all fields
def all_fields
((ro_fields = _fields(true)).select(&:defined).presence || ro_fields).collect do |f|
f.section = self
f
end
end
# Get all fields defined as visible, in the correct order.
def visible_fields
i = 0
all_fields.collect { |f| f.with(bindings) }.select(&:visible?).sort_by { |f| [f.order, i += 1] } # stable sort, damn
end
protected
# Raw fields.
# Recursively returns parent section's raw fields
# Duping it if accessed for modification.
def _fields(readonly = false)
return @_fields if @_fields
return @_ro_fields if readonly && @_ro_fields
if self.class == RailsAdmin::Config::Sections::Base
@_ro_fields = @_fields = RailsAdmin::Config::Fields.factory(self)
else
# parent is RailsAdmin::Config::Model, recursion is on Section's classes
@_ro_fields ||= parent.send(self.class.superclass.to_s.underscore.split('/').last)._fields(true).freeze
end
readonly ? @_ro_fields : (@_fields ||= @_ro_fields.collect(&:clone))
end
end
end
end
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