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Escape wildcard characters in LIKE clause

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labocho 2012-11-26 13:39:40 +09:00
parent 3542cf4f29
commit fad3ac9921
2 changed files with 16 additions and 6 deletions
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18
lib/ransack/constants.rb
View file

@ -6,12 +6,12 @@ module Ransack
AREL_PREDICATES = %w(eq not_eq matches does_not_match lt lteq gt gteq in not_in)
DERIVED_PREDICATES = [
['cont', {:arel_predicate => 'matches', :formatter => proc {|v| "%#{v}%"}}],
['not_cont', {:arel_predicate => 'does_not_match', :formatter => proc {|v| "%#{v}%"}}],
['start', {:arel_predicate => 'matches', :formatter => proc {|v| "#{v}%"}}],
['not_start', {:arel_predicate => 'does_not_match', :formatter => proc {|v| "#{v}%"}}],
['end', {:arel_predicate => 'matches', :formatter => proc {|v| "%#{v}"}}],
['not_end', {:arel_predicate => 'does_not_match', :formatter => proc {|v| "%#{v}"}}],
['cont', {:arel_predicate => 'matches', :formatter => proc {|v| "%#{escape_wildcards(v)}%"}}],
['not_cont', {:arel_predicate => 'does_not_match', :formatter => proc {|v| "%#{escape_wildcards(v)}%"}}],
['start', {:arel_predicate => 'matches', :formatter => proc {|v| "#{escape_wildcards(v)}%"}}],
['not_start', {:arel_predicate => 'does_not_match', :formatter => proc {|v| "#{escape_wildcards(v)}%"}}],
['end', {:arel_predicate => 'matches', :formatter => proc {|v| "%#{escape_wildcards(v)}"}}],
['not_end', {:arel_predicate => 'does_not_match', :formatter => proc {|v| "%#{escape_wildcards(v)}"}}],
['true', {:arel_predicate => 'eq', :compounds => false, :type => :boolean, :validator => proc {|v| TRUE_VALUES.include?(v)}}],
['false', {:arel_predicate => 'eq', :compounds => false, :type => :boolean, :validator => proc {|v| TRUE_VALUES.include?(v)}, :formatter => proc {|v| !v}}],
['present', {:arel_predicate => 'not_eq_all', :compounds => false, :type => :boolean, :validator => proc {|v| TRUE_VALUES.include?(v)}, :formatter => proc {|v| [nil, '']}}],
@ -19,5 +19,11 @@ module Ransack
['null', {:arel_predicate => 'eq', :compounds => false, :type => :boolean, :validator => proc {|v| TRUE_VALUES.include?(v)}, :formatter => proc {|v| nil}}],
['not_null', {:arel_predicate => 'not_eq', :compounds => false, :type => :boolean, :validator => proc {|v| TRUE_VALUES.include?(v)}, :formatter => proc {|v| nil}}]
]
module_function
# replace % _ \ to \% \_ \\
def escape_wildcards(unescaped)
unescaped.gsub(/\\/){ "\\\\" }.gsub(/%/, "\\%").gsub(/_/, "\\_")
end
end
end

4
spec/ransack/predicate_spec.rb
View file

@ -29,6 +29,10 @@ module Ransack
@s.name_cont = 'ric'
@s.result.to_sql.should match /"people"."name" LIKE '%ric%'/
end
it 'escapes %, _ and \\ in value' do
@s.name_cont = '%_\\'
@s.result.to_sql.should match /"people"."name" LIKE '%\\%\\_\\\\%'/
end
end
describe 'not_cont' do