Module: WandoGrids

Defined in:
lib/wando_grid.rb

Instance Method Summary collapse

Instance Method Details

#build_filter_options(object, filter_hash) ⇒ Object

Grid每一列的查询



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# File 'lib/wando_grid.rb', line 77

def build_filter_options(object, filter_hash)
  return {} if filter_hash.nil?

  fs          = {}
  filter_hash = filter_hash.delete_if { |key, value| value.blank? }

  filter_hash.each do |columns, fvals|
    fs_tmp        = {}
    relation      = JSON.parse(params[:columnsConfig])
    gf_field      = relation.invert[fvals[:field]].downcase.gsub("/", "_")
    gf_type       = fvals[:data][:type].downcase
    gf_value      = fvals[:data][:value]
    gf_comparison = fvals[:data][:comparison]

    case gf_type
      when 'numeric'
        case gf_comparison
          when 'gt'
            gf_field += "_gt"
          when 'lt'
            gf_field += "_lt"
          when 'eq'
            gf_field += "_eq"
          when 'ne'
            gf_field += "_neq"
        end

        fs_tmp[gf_field.to_sym] = gf_value.to_i
      when 'string'
        gf_field += "_cont"

        fs_tmp[gf_field.to_sym] = gf_value.to_s
      when 'boolean'
        gf_value = gf_value.downcase

        if gf_value == 'true' or gf_value == 'false'
          gf_field += "_" + gf_value
          fs_tmp[gf_field.to_sym] = "1"
        end
      when 'list'
        gf_field += "_cont"

        fs_tmp[gf_field.to_sym] = gf_value.to_s
      when 'date'
        case gf_comparison
          when 'gt'
            gf_field += '_gt'
          when 'lt'
            gf_field += '_lt'
          when 'eq'
            gf_field += '_eq'
          when 'ne'
            gf_field += '_neq'
        end

        fs_tmp[gf_field.to_sym] = gf_value
    end

    unless fs_tmp.empty?
      fs.merge!(fs_tmp)
    end
  end

  fs
end

#get_record_by_fields(fields, object, option = {}) ⇒ Object

通过Grid的Field来构造Record记录



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# File 'lib/wando_grid.rb', line 68

def get_record_by_fields(fields, object, option = {})
  fields = JSON.parse(fields) unless fields.is_a?(Array)
  records = object.where(option).provide(*fields)

  result = { :result => records }
  render_json result
end

#wando_grid(params, object, option = {}, toLoadData = true) ⇒ Object

wando_grid的入口函数,返回请求记录，和记录总数



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# File 'lib/wando_grid.rb', line 12

def wando_grid(params, object, option = {}, toLoadData = true)
  object, result = wando_grid_in_json(params, object, option, toLoadData)
  
  result = { :total => object.count, :result => result }
  render_json  result
end

#wando_grid_for_array(params, array) ⇒ Object 



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# File 'lib/wando_grid.rb', line 143

def wando_grid_for_array params, array
 fields, column_name, result = [], [], []

 relations = JSON.parse(params[:columnsConfig])
 relations.each do |o ,e|
   fields << e
   column_name << o
 end

 column_name.push("id")
 records = array.provide(*column_name)

 records.each do |r|
   result << Hash[r.map {|k, v| [relations[k], v] }]
 end

 render :json => { :success => true, :total => array.count, :result => result }
  
end

#wando_grid_in_json(params, object, option, toLoadData) ⇒ Object

构造JSON格式的Grid记录



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# File 'lib/wando_grid.rb', line 20

def wando_grid_in_json(params, object, option, toLoadData)
  unless toLoadData
    return [], []
  end

  order = "updated_at DESC"
  unless params[:sort].nil?
    JSON.parse(params[:sort]).each do |k|
      if object.column_names.include?(k["property"])
        order = k["property"].to_s + " " + k["direction"].to_s
      else
        order = 'id' + ' ' + k["direction"].to_s
      end
    end
  end

  default_options = {
                      :order  => params[:order],
                      :offset => params[:offeset].to_i,
                      :start  => params[:start].to_i || 0,
                      :limit  => params[:limit].to_i || 20
                    }
  fields, column_name, result = [], [], []

  relations = JSON.parse(params[:columnsConfig])
  relations.each do |o ,e|
    fields << e
    column_name << o
  end

  column_name.push("id")
  offset = default_options[:offeset].to_i + default_options[:start].to_i
  records = object.where(option)
                  .order(order)
                  .limit(params[:limit])
                  .offset(offset)
                  .search(build_filter_options(object, params[:filter]))
                  .result(:distinct => true)
                  .provide(*column_name)

  records.each do |r|
    result << Hash[r.map {|k, v| [relations[k], v] }]
  end

  return object.where(option), result
end