Module: ModelFact::Helpers::ActiveRecordHelper::ClassMethods

Includes:
TR::CondUtils
Defined in:
lib/model_fact/helpers/ar_helpers.rb

Instance Method Summary collapse

Instance Method Details

#filter(opts = {}, &block) ⇒ Object

Standardized search API

Issue : Record need to be part of the business object as Banis is controller driven. Whatever return from AR need to be converted to business model which difficult to be done generically



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 41

def filter(opts = {}, &block)
  
  res = self.all

  @goToPage = 0

  if block

    filter = FilterBuilder.new
    flt = block.call(:cond, filter)

    orArray = []
    if not_empty?(flt.main_cond)
      flt.main_cond.each do |val|
        val.each do |k,v|
          case k
          when :and
            res = res.where(v)
          when :or
            val[:or].each do |r,vv|
              orArray << ["#{r} = #{vv}"]
            end
          end
        end
      end

      res = res.where("(#{orArray.join(" or ")})") if not_empty?(orArray)

    end

    if not_empty?(flt.modifier)
      flt.modifier.each do |mod|
        mod.each do |k,v|
          case k
          when :sort
            res = res.order(v)
          when :first
            cnt = v || 1
            res = res.first(cnt)
          when :last
            cnt = v || 1
            res = res.last(cnt)
          when :page
            @goToPage = v
          end
        end
      end
    end

    ignorePaging = block.call(:ignore_paging?)
    ignorePaging = false if is_empty?(ignorePaging)

    if is_paginated? and not ignorePaging

      ttl = res.count
      block.call(:result, :total_record, ttl)

      ttlPage = (ttl/per_page_count).to_i
      ttlPage += 1 if (ttlPage*per_page_count) != ttl
      block.call(:result, :total_page, ttlPage)

      res = res.limit(per_page_count)

      if @goToPage <= 0
        block.call(:result, :first_page?, true) 
      else
        block.call(:result, :first_page?, false)
      end

      offset = @goToPage * per_page_count
      res = res.offset(offset)

      if (offset+per_page_count) >= ttl
        block.call(:result, :last_page?, true) 
      else
        block.call(:result, :last_page?, false)
      end

    end

    if flt.is_return_count?
      res.count
    else
      translate(res)
    end

  else
    translate(res)
  end

end

#find_record(opts = {}, &block) ⇒ Object Also known as: find_records 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 161

def find_record(opts = {}, &block)
  self.filter do |ops, *val|
    case ops
    when :cond
      val.first.filter(opts)
    else
      block.call(ops, *val) if block
    end
  end
end

#first(row = 1) ⇒ Object 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 141

def first(row = 1)
  res = self.filter do |ops, val|
    case ops
    when :cond
      val.first(row)
    end
  end
  res.first if row == 1
end

#is_paginated? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/model_fact/helpers/ar_helpers.rb', line 272

def is_paginated?
  not_empty?(@_paginate) and @_paginate
end

#last(row = 1) ⇒ Object 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 151

def last(row = 1)
  res = self.filter do |ops, val|
    case ops
    when :cond
      val.last(row)
    end
  end
  res.first if row == 1
end

#listeners ⇒ Object 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 29

def listeners
  _listeners.freeze
end

#on_event(evt, opts = { }, &block) ⇒ Object 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 16

def on_event(evt, opts = { }, &block)
  
  _listeners[evt] = [] if _listeners[evt].nil?

  case evt
  when :before_save
    _listeners[evt] << block
    self.class.class_eval <<-END
    before_save :_mf_trigger_listener(:before_save)
    END
  end
end

#paginate(opts = {}) ⇒ Object

Paginate helpers



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 259

def paginate(opts = {})
  @_per_page = opts[:per_page] || 10 
  @_paginate = true
end

#per_page_count ⇒ Object 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 264

def per_page_count
  @_per_page 
end

#per_page_count=(val) ⇒ Object 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 268

def per_page_count=(val)
  @_per_page = val
end

#record_translator(&block) ⇒ Object

def last_record(count = 1)

translate(self.last(count).first)

end



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 246

def record_translator(&block)
  @recTranslator = block
end

#remove(rec) ⇒ Object 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 133

def remove(rec)
  self.delete(rec) 
end

#remove_all ⇒ Object 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 137

def remove_all
  self.delete_all
end

#translate(rec) ⇒ Object 



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# File 'lib/model_fact/helpers/ar_helpers.rb', line 250

def translate(rec)
  if @recTranslator
    @recTranslator.call(rec)
  else
    rec
  end
end