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module DateScopes | |
extend ActiveSupport::Concern | |
module ClassMethods | |
def define_date_scopes(*scope_columns) | |
scope_columns.map(&:to_s).each do |column| | |
match_data = column.match(/^(.*)_at$/) | |
name = match_data ? match_data[1] : column | |
from_date = "#{name}_from".to_sym | |
scope from_date, -> (date) do | |
where("#{self.table_name}.#{column} >= ?", scope_value(column, date, :beginning_of_day)) | |
end | |
to_date = "#{name}_to".to_sym | |
scope to_date, -> (date) do | |
where("#{self.table_name}.#{column} <= ?", scope_value(column, date, :end_of_day)) | |
end | |
between_dates = "#{name}_between".to_sym | |
scope between_dates, -> (from, to) do | |
self.send(from_date, from).send(to_date, to) | |
end | |
end | |
end | |
private | |
def scope_value(column, value, time = nil) | |
case date_column_types[column] | |
when :date then value.to_date | |
when :datetime then value.to_datetime.in_time_zone.send(time) | |
end | |
end | |
def date_column_types | |
@date_column_types ||= self.columns_hash.each_with_object({}) do |(name, column), hash| | |
hash[name] = column.type if [:date, :datetime].include?(column.type) | |
end | |
end | |
end | |
end | |
ActiveRecord::Base.send(:include, DateScopes) |
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Let your
Post
model hascreated_at
andpublished_at
fields.You can specify in
models/post.rb
define_date_scopes :created_at, :published_at
Now
Post
model has scopescreated_from
,created_to
,created_between
published_from
,published_to
,published_between