Giving the tsvector and tsquery stuff a shot. Ref #353 (#1019)

spec/avram/string_criteria_spec.cr

@@ -64,6 +64,12 @@ describe String::Lucky::Criteria do
       name.reverse.eq("revir").to_sql.should eq ["SELECT #{QueryMe::COLUMN_SQL} FROM users WHERE REVERSE(users.name) = $1", "revir"]
     end
   end
+
+  describe "match" do
+    it "uses @@" do
+      name.to_tsvector.match("jeb").to_sql.should eq ["SELECT #{QueryMe::COLUMN_SQL} FROM users WHERE TO_TSVECTOR(users.name) @@ TO_TSQUERY($1)", "jeb"]
+    end
+  end
 end
 
 private def name

src/avram/charms/string_extensions.cr

@@ -38,11 +38,17 @@ class String
         add_clause(Avram::Where::Ilike.new(column, value))
       end
 
+      def match(value : String) : T
+        add_clause(Avram::Where::TsMatch.new(column, value))
+      end
+
       define_function_criteria(upper, V)
       define_function_criteria(lower, V)
       define_function_criteria(trim, String)
       define_function_criteria(length, Int64)
       define_function_criteria(reverse, String)
+      define_function_criteria(to_tsvector, String)
+      define_function_criteria(to_tsquery, String)
     end
   end
 end

src/avram/where.cr

@@ -365,6 +365,34 @@ module Avram::Where
     end
   end
 
+  class TsMatch < ValueHoldingSqlClause
+    def operator : String
+      "@@"
+    end
+
+    def negated : TsNotMatch
+      TsNotMatch.new(column, value)
+    end
+
+    def prepare(placeholder_supplier : Proc(String)) : String
+      "#{column} #{operator} TO_TSQUERY(#{placeholder_supplier.call})"
+    end
+  end
+
+  class TsNotMatch < ValueHoldingSqlClause
+    def operator : String
+      "@@"
+    end
+
+    def negated : TsMatch
+      TsMatch.new(column, value)
+    end
+
+    def prepare(placeholder_supplier : Proc(String)) : String
+      "NOT(#{column} #{operator} TO_TSQUERY(#{placeholder_supplier.call}))"
+    end
+  end
+
   class Raw < Condition
     @clause : String