Class: DynamicQuery::DynamicQueryInstance

Inherits:
Object
  • Object
show all
Includes:
CombinedQuery, Validator
Defined in:
lib/dynamic_query.rb

Instance Method Summary collapse

Methods included from CombinedQuery

#combine_query, #conditions

Methods included from Validator

#filter_valid_info

Methods included from Joiner

#join

Constructor Details

#initialize(*models, opt) ⇒ DynamicQueryInstance

Returns a new instance of DynamicQueryInstance.



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# File 'lib/dynamic_query.rb', line 58

def initialize(*models, opt)
  @reveal_keys = false
  @white_list = []
  @black_list = []
  @aliases = {}
  
  if opt.kind_of? Array
    models = models + opt
    opt = {}
  end
  
  unless opt.kind_of? Hash
    models << opt
    opt = {}
  end
  
  models.map! do |m|
    if [String, Symbol].include? m.class
      m.to_s.split(/_/).map { |word| word.capitalize }.join.constantize
    else
      m
    end       
  end
  
  opt.each do |key, val|
    @reveal_keys = true if key == :reveal_keys && val
    
    if key == :accept
      val.each do |model, columns|
        if models.include? model
          # model = model.to_s.split(/_/).map { |word| word.capitalize }.join.constantize
          columns.each { |col|  @white_list << "#{model.table_name}.#{col}" }
        end
      end
    end
    
    if key == :reject
      val.each do |model, columns|
        if models.include? model
          # model = model.to_s.split(/_/).map { |word| word.capitalize }.join.constantize
          columns.each { |col|  @black_list << "#{model.table_name}.#{col}" }
        end
      end
    end
    
    if key == :alias
      @aliases = val.kind_of?(Hash) ? val.clone : {}
    end
  end if opt.kind_of? Hash
  
  @columns = {}
  models.each do |model|
    # model = model.to_s.split(/_/).map { |word| word.capitalize }.join.constantize
    model = Hash[model.columns.map { |col| ["#{model.table_name}.#{col.name}"] * 2 }]
    @columns.merge! model
  end
  
  @column_types = {}
  models.each do |model|
    # model = model.to_s.split(/_/).map { |word| word.capitalize }.join.constantize
    model = Hash[model.columns.map { |col| ["#{model.table_name}.#{col.name}", col.type] }]
    @column_types.merge! model
  end
  
  unless @reveal_keys
    @columns.keys.each do |key|
      @columns.delete key if key =~ /\.id$/ || key =~ /_id$/
    end
  end
  
  unless @white_list.empty?
    selected_columns = {}
    @white_list.each do |white|
      selected_columns[white] = @columns[white] if @columns.keys.include? white
    end
    @columns = selected_columns
  end
  
  @black_list.each { |black| @columns.delete black }
  
  translate_columns = {}
  used_aliases = {}
  @columns.each do |option, value|
    if @aliases[option]
      used_aliases[option] = @aliases[option]
      translate_columns[@aliases[option]] = value
    else
      translate_columns[option] = value
    end
  end
  @columns = translate_columns
  @aliases = used_aliases
end

Instance Method Details

#panel(query) ⇒ Object 



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# File 'lib/dynamic_query.rb', line 152

def panel(query)
  query ||= { 'or_1' => { 'and_1' => { :column => '', :operator => '', :value1 => '', :value2 => '' } } }
  query = query.clone
  action = query[:action]
  
  panel = filter_valid_info(query)
  panel_action(panel, action)
  panel[:columns] = @columns.clone
  
  panel
end

#statement(query) ⇒ Object 



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# File 'lib/dynamic_query.rb', line 164

def statement(query)
  query ||= { 'or_1' => { 'and_1' => { :column => '', :operator => '', :value1 => '', :value2 => '' } } }
  query = query.clone
  query = filter_valid_info(query)
  
  or_stat = []
  query.each do |or_key, or_val|
    and_stat = [[]]
    or_val.each do |and_key, and_val|
      if @columns.include?(and_val[:column]) || @aliases.include?(and_val[:column])
        case and_val[:operator]
        when '=', '>', '>=', '<', '<=', '!=', 'LIKE', 'NOT LIKE'
          unless and_val[:value1].blank?
            and_stat[0] << "#{and_val[:column]} #{and_val[:operator]} ?"
            and_stat << and_val[:value1]
          end
        when 'IN', 'NOT IN'
          unless and_val[:value1].delete(',').blank?
            and_stat[0] << "#{and_val[:column]} #{and_val[:operator]} (?)"
            and_stat << and_val[:value1].split(/,/).delete_if { |word| word.blank? }.map { |word| word.strip }
          end
        when 'BETWEEN', 'NOT BETWEEN'
          unless and_val[:value1].blank? || and_val[:value2].blank?
            and_stat[0] << "#{and_val[:column]} #{and_val[:operator]} ? AND ?"
            and_stat << and_val[:value1] << and_val[:value2]
          end
        when 'IS NULL', 'IS NOT NULL'
          and_stat[0] << "#{and_val[:column]} #{and_val[:operator]}"
        end
      end
    end
          
    and_stat[0] = and_stat[0].join(' AND ')
    or_stat << and_stat unless and_stat[0].empty?
  end
    
  or_stat.each { |and_stat| and_stat[0] = "(#{and_stat[0]})" }
  stat = []; params = []
  or_stat.each do |and_stat|
    stat << and_stat.shift
    params = params + and_stat
  end
  params.unshift(stat.join(' OR '))
end