Module: DefaultWhere::Scope

Included in:
DefaultWhere
Defined in:
lib/default_where/scope.rb

Constant Summary collapse

PATTERN = 
{
  gt: '>',
  gte: '>=',
  lt: '<',
  lte: '<=',
  not: '!=',
  like: 'LIKE',
  rl: 'LIKE',
  ll: 'LIKE',
  :'' => '='
}.freeze

Instance Method Summary collapse

Instance Method Details

#default_where_scope(params) ⇒ Object 



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# File 'lib/default_where/scope.rb', line 17

def default_where_scope(params)
  where_string = []
  where_hash = {}

  params.each do |key, value|
    real_key, sign_str = key.split('-')
    agent_key = key.gsub(/[-.\/]/, '_')

    if value.nil? || value == []
      if sign_str == 'not'
        where_string << "#{real_key} IS NOT NULL"
      elsif sign_str.nil?
        where_string << "#{real_key} IS NULL"
      else
        raise "#{key}'s value can not be nil"
      end
    elsif sign_str == 'any' # 支持 postgres array 查询
      where_string << ":#{agent_key} = ANY(#{real_key})"
      where_hash.merge! agent_key.to_sym => value
    elsif real_key.match?(/.\/./) # 支持 postgres json 查询
      real_key, i18n_key = key.split('/')
      where_string << "#{real_key}->>'#{i18n_key}' = :#{agent_key}"
      where_hash.merge! agent_key.to_sym => value
    else
      case sign_str
      when 'll'
        real_value = "#{value}%"
      when 'rl'
        real_value = "%#{value}"
      when 'like'
        real_value = "%#{value}%"
      else
        real_value = value
      end

      where_string << "#{table_name}.#{real_key} #{PATTERN[sign_str.to_s.to_sym]} :#{agent_key}"
      where_hash.merge! agent_key.to_sym => real_value
    end
  end

  [where_string, where_hash]
end