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authorMichael Shepanski <michael@codesynthesis.com>2014-11-05 14:23:54 +1100
committerBoris Kolpackov <boris@codesynthesis.com>2014-11-10 16:48:59 +0200
commit64b27b86025d160e49bf617143d80671ccb1e0e4 (patch)
tree1abc0df10d797d0d845e0590c1cb9a077e4a42af /common/query/one/driver.cxx
parentdee5f10d1d75eee43596ad1dfb47ecec9e0b1307 (diff)
Implement {query,execute}_{one,value}() shortcut functions
Useful in situations where the query is know to return at most one element (*_one) or exactly one element (*_value).
Diffstat (limited to 'common/query/one/driver.cxx')
-rw-r--r--common/query/one/driver.cxx204
1 files changed, 204 insertions, 0 deletions
diff --git a/common/query/one/driver.cxx b/common/query/one/driver.cxx
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+++ b/common/query/one/driver.cxx
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+// file : common/query/one/driver.cxx
+// copyright : Copyright (c) 2009-2014 Code Synthesis Tools CC
+// license : GNU GPL v2; see accompanying LICENSE file
+
+// Test query one support.
+//
+// We assume that other tests in common/query/ exercise a variety of
+// different kinds of queries. Here we are concerned with what is
+// specific to query_one() and query_value().
+//
+
+#include <memory> // std::auto_ptr
+#include <cassert>
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+
+#include <common/common.hxx>
+
+#include "test.hxx"
+#include "test-odb.hxx"
+
+using namespace std;
+using namespace odb::core;
+
+int
+main (int argc, char* argv[])
+{
+ try
+ {
+ auto_ptr<database> db (create_database (argc, argv));
+ odb::database_id db_id (db->id ());
+
+ transaction t (db->begin ());
+
+ // query_one()
+ //
+ {
+ auto_ptr<object> o (db->query_one<object> ());
+ assert (o.get () == 0);
+ }
+
+ {
+ object o (4);
+ assert (!db->query_one<object> (o) && o.id_ == 4 && o.str_.empty ());
+ }
+
+ /*
+ {
+ object o (db->query_value<object> ());
+ assert (false);
+ }
+ */
+
+ object o (1);
+ o.str_ = "value 1";
+ db->persist (o);
+
+ {
+ auto_ptr<object> o (db->query_one<object> ());
+ assert (o.get () != 0 && o->str_ == "value 1");
+ }
+
+ {
+ object o;
+ assert (db->query_one<object> (o) && o.str_ == "value 1");
+ }
+
+ {
+ object o (db->query_value<object> ());
+ assert (o.str_ == "value 1");
+ }
+
+ // query_one(const char*)
+ //
+ const char* q1_c (db_id == odb::id_oracle ? "\"id\" = 1" : "id = 1");
+ const char* q0_c (db_id == odb::id_oracle ? "\"id\" = 2" : "id = 2");
+
+ {
+ auto_ptr<object> o (db->query_one<object> (q1_c));
+ assert (o.get () != 0 && o->str_ == "value 1");
+ }
+
+ {
+ auto_ptr<object> o (db->query_one<object> (q0_c));
+ assert (o.get () == 0);
+ }
+
+ {
+ object o;
+ assert (db->query_one<object> (q1_c, o) && o.str_ == "value 1");
+ }
+
+ {
+ object o (4);
+ assert (!db->query_one<object> (q0_c, o) &&
+ o.id_ == 4 && o.str_.empty ());
+ }
+
+ {
+ object o (db->query_value<object> (q1_c));
+ assert (o.str_ == "value 1");
+ }
+
+ // query_one(std::string)
+ //
+ string q1_s (q1_c);
+ string q0_s (q0_c);
+
+ {
+ auto_ptr<object> o (db->query_one<object> (q1_s));
+ assert (o.get () != 0 && o->str_ == "value 1");
+ }
+
+ {
+ auto_ptr<object> o (db->query_one<object> (q0_s));
+ assert (o.get () == 0);
+ }
+
+ {
+ object o;
+ assert (db->query_one<object> (q1_s, o) && o.str_ == "value 1");
+ }
+
+ {
+ object o (4);
+ assert (!db->query_one<object> (q0_s, o) &&
+ o.id_ == 4 && o.str_.empty ());
+ }
+
+ {
+ object o (db->query_value<object> (q1_s));
+ assert (o.str_ == "value 1");
+ }
+
+ // query_one(odb::query)
+ //
+ typedef odb::query<object> query;
+
+ query q1 (query::id == 1);
+ query q0 (query::id == 2);
+
+ {
+ auto_ptr<object> o (db->query_one<object> (q1));
+ assert (o.get () != 0 && o->str_ == "value 1");
+ }
+
+ {
+ auto_ptr<object> o (db->query_one<object> (q0));
+ assert (o.get () == 0);
+ }
+
+ {
+ object o;
+ assert (db->query_one<object> (q1, o) && o.str_ == "value 1");
+ }
+
+ {
+ object o (4);
+ assert (!db->query_one<object> (q0, o) && o.id_ == 4 && o.str_.empty ());
+ }
+
+ {
+ object o (db->query_value<object> (q1));
+ assert (o.str_ == "value 1");
+ }
+
+ // Assertion on more than one element.
+ //
+ {
+ object o (2);
+ o.str_ = "value 2";
+ db->persist (o);
+ }
+
+ /*
+ {
+ auto_ptr<object> o (db->query_one<object> ());
+ assert (false);
+ }
+ */
+
+ /*
+ {
+ object o;
+ db->query_one<object> (o);
+ assert (false);
+ }
+ */
+
+ /*
+ {
+ object o (db->query_value<object> ());
+ assert (false);
+ }
+ */
+ }
+ catch (const odb::exception& e)
+ {
+ cerr << e.what () << endl;
+ return 1;
+ }
+}