Module: UtilityHelper

Included in:
FormHelperTest, FormatHelperTest, TableHelperTest
Defined in:
app/helpers/utility_helper.rb

Overview

View helpers for basic functions used in various other helpers.

Constant Summary collapse

EMPTY_STRING =

non-breaking space asserts better css.

" ".html_safe.freeze

Instance Method Summary collapse

Instance Method Details

#add_css_class(options, classes) ⇒ Object

Adds a class to the given options, even if there are already classes.



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# File 'app/helpers/utility_helper.rb', line 30

def add_css_class(options, classes)
  if options[:class]
    options[:class] += " #{classes}" if classes
  else
    options[:class] = classes
  end
end

#assoc_and_id_attr(attr) ⇒ Object

Returns the name of the attr and it’s corresponding field



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# File 'app/helpers/utility_helper.rb', line 72

def assoc_and_id_attr(attr)
  attr = attr.to_s
  if attr.end_with?("_id")
    [ attr[0..-4], attr ]
  elsif attr.end_with?("_ids")
    [ attr[0..-5].pluralize, attr ]
  else
    [ attr, "#{attr}_id" ]
  end
end

#association(obj, attr, *macros) ⇒ Object

Returns the association proxy for the given attribute. The attr parameter may be the _id column or the association name. If a macro (e.g. :belongs_to) is given, the association must be of this type, otherwise, any association is returned. Returns nil if no association (or not of the given macro) was found.



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# File 'app/helpers/utility_helper.rb', line 63

def association(obj, attr, *macros)
  if obj.class.respond_to?(:reflect_on_association)
    name = assoc_and_id_attr(attr).first.to_sym
    assoc = obj.class.reflect_on_association(name)
    assoc if assoc && (macros.blank? || macros.include?(assoc.macro))
  end
end

#column_property(obj, attr, property) ⇒ Object

Returns an ActiveRecord column property for the passed attr or nil



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# File 'app/helpers/utility_helper.rb', line 52

def column_property(obj, attr, property)
  if obj.respond_to?(:column_for_attribute) && obj.has_attribute?(attr)
    obj.column_for_attribute(attr).send(property)
  end
end

#column_type(obj, attr) ⇒ Object

Returns the ActiveRecord column type or nil.



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# File 'app/helpers/utility_helper.rb', line 47

def column_type(obj, attr)
  column_property(obj, attr, :type)
end

#content_tag_nested(tag, collection, **options, &block) ⇒ Object

Render a content tag with the collected contents rendered by &block for each item in collection.



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# File 'app/helpers/utility_helper.rb', line 10

def content_tag_nested(tag, collection, **options, &block)
  content_tag(tag, safe_join(collection, &block), **options)
end

#default_crud_attrs ⇒ Object

The default attributes to use in attrs, list and form partials. These are all defined attributes except certain special ones like ‘id’ or ‘position’.



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# File 'app/helpers/utility_helper.rb', line 41

def default_crud_attrs
  attrs = model_class.column_names.map(&:to_sym)
  attrs - i[id position password]
end

#flash_class(level) ⇒ Object

Returns the css class for the given flash level.



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# File 'app/helpers/utility_helper.rb', line 21

def flash_class(level)
  case level
  when :notice then "success"
  when :alert then "error"
  else level.to_s
  end
end

#safe_join(array, sep = $OUTPUT_FIELD_SEPARATOR, &block) ⇒ Object

Overridden method that takes a block that is executed for each item in array before appending the results.



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# File 'app/helpers/utility_helper.rb', line 16

def safe_join(array, sep = $OUTPUT_FIELD_SEPARATOR, &block)
  super(block_given? ? array.map(&block).compact : array, sep)
end