1 # Mixin module providing a method to convert filters into a list of SQL
2 # fragments suitable to be fed to ActiveRecord #where.
11 # +filters+ array of conditions, each being [column, operator, operand]
12 # +model_class+ subclass of ActiveRecord being filtered
16 # :cond_out array of SQL fragments for each filter expression
17 # :param_out array of values for parameter substitution in cond_out
18 def record_filters filters, model_class
22 ar_table_name = model_class.table_name
23 filters.each do |filter|
24 attrs_in, operator, operand = filter
25 if attrs_in == 'any' && operator != '@@'
26 attrs = model_class.searchable_columns(operator)
27 elsif attrs_in.is_a? Array
32 if !filter.is_a? Array
33 raise ArgumentError.new("Invalid element in filters array: #{filter.inspect} is not an array")
34 elsif !operator.is_a? String
35 raise ArgumentError.new("Invalid operator '#{operator}' (#{operator.class}) in filter")
43 raise ArgumentError.new("Full text search on individual columns is not supported")
45 # Skip the generic per-column operator loop below
47 # Use to_tsquery since plainto_tsquery does not support prefix
48 # search. Instead split operand, add ':*' to each word and
49 # join the words with ' & '
50 cond_out << model_class.full_text_tsvector+" @@ to_tsquery(?)"
51 param_out << operand.split.each {|s| s.concat(':*')}.join(' & ')
54 if !model_class.searchable_columns(operator).index attr.to_s
55 raise ArgumentError.new("Invalid attribute '#{attr}' in filter")
57 case operator.downcase
58 when '=', '<', '<=', '>', '>=', '!=', 'like', 'ilike'
59 attr_type = model_class.attribute_column(attr).type
60 operator = '<>' if operator == '!='
61 if operand.is_a? String
62 if attr_type == :boolean
63 if not ['=', '<>'].include?(operator)
64 raise ArgumentError.new("Invalid operator '#{operator}' for " \
65 "boolean attribute '#{attr}'")
68 when '1', 't', 'true', 'y', 'yes'
70 when '0', 'f', 'false', 'n', 'no'
73 raise ArgumentError("Invalid operand '#{operand}' for " \
74 "boolean attribute '#{attr}'")
77 cond_out << "#{ar_table_name}.#{attr} #{operator} ?"
78 if (# any operator that operates on value rather than
80 operator.match(/[<=>]/) and (attr_type == :datetime))
81 operand = Time.parse operand
84 elsif operand.nil? and operator == '='
85 cond_out << "#{ar_table_name}.#{attr} is null"
86 elsif operand.nil? and operator == '<>'
87 cond_out << "#{ar_table_name}.#{attr} is not null"
88 elsif (attr_type == :boolean) and ['=', '<>'].include?(operator) and
89 [true, false].include?(operand)
90 cond_out << "#{ar_table_name}.#{attr} #{operator} ?"
93 raise ArgumentError.new("Invalid operand type '#{operand.class}' "\
94 "for '#{operator}' operator in filters")
97 if operand.is_a? Array
98 cond_out << "#{ar_table_name}.#{attr} #{operator} (?)"
100 if operator == 'not in' and not operand.include?(nil)
101 # explicitly allow NULL
102 cond_out[-1] = "(#{cond_out[-1]} OR #{ar_table_name}.#{attr} IS NULL)"
105 raise ArgumentError.new("Invalid operand type '#{operand.class}' "\
106 "for '#{operator}' operator in filters")
109 operand = [operand] unless operand.is_a? Array
112 cl = ArvadosModel::kind_class op
114 cond << "#{ar_table_name}.#{attr} like ?"
115 param_out << cl.uuid_like_pattern
120 cond_out << cond.join(' OR ')
123 conds_out << cond_out.join(' OR ') if cond_out.any?
126 {:cond_out => conds_out, :param_out => param_out}