undefined method beginning_of_day for string with ransacker custom filter

Question

I'm getting below mentioned error. any idea how i can fix it ?

undefined method `beginning_of_day' for "2018-01-01":String
/lib/ransack_ext.rb
config.add_predicate old, arel_predicate: current
end
config.add_predicate 'gteq_datetime',
arel_predicate: 'gteq',
formatter: ->(v) { v.beginning_of_day }

Code:

Projects.rb (ActiveAdmin)

filter :project_event_date, label: 'By Project Event Date', as: :date_range

Project.rb(model)

 has_many :project_events, dependent: :destroy

 ransacker :project_event_date do
  "project_events.event_date"
 end

Answer 1

According to the docs , beginning_of_day() :

Converts Date to a Time (or DateTime if necessary) with the time portion set to the beginning of the day (0:00)

A String is not a Date . So, convert your String to a Date and you should be good to go.

Answer 2

首先将字符串转换为日期，然后应用begin_of_day这样的方法：-

Date.parse("2018-01-01").beginning_of_day

Answer 3

this will help you

ruby ransacker :project_event_date, type: :date do Arel.sql("project_events.event_date") end

ransacker block result should be built using Arel like it shown on Using Ransacker Guide

active_admin has custom formatter for predicate like
formatter: proc { |v| v.beginning_of_day }
so you need to convert passed value into date

best way will be to provide type or formatter to ransacker

Answer 4

在数据源中将日期时间转换为日期字段为我解决了问题