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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/prepared
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/prepared')
-rw-r--r--common/prepared/driver.cxx40
-rw-r--r--common/prepared/test.hxx4
2 files changed, 42 insertions, 2 deletions
diff --git a/common/prepared/driver.cxx b/common/prepared/driver.cxx
index dfbdf13..ee690a1 100644
--- a/common/prepared/driver.cxx
+++ b/common/prepared/driver.cxx
@@ -411,6 +411,46 @@ main (int argc, char* argv[])
t.commit ();
}
+
+ // Test execute_one() and execute_value().
+ //
+ {
+ transaction t (db->begin ());
+
+ person p ("John Doe", 23);
+ db->persist (p);
+
+ prep_query pq1 (
+ db->prepare_query<person> ("query-1", query::id == p.id_));
+ prep_query pq0 (
+ db->prepare_query<person> ("query-0", query::id == p.id_ + 1));
+
+ {
+ auto_ptr<person> p (pq1.execute_one ());
+ assert (p.get () != 0 && p->name_ == "John Doe");
+ }
+
+ {
+ auto_ptr<person> p (pq0.execute_one ());
+ assert (p.get () == 0);
+ }
+
+ {
+ person p;
+ assert (pq1.execute_one (p) && p.name_ == "John Doe");
+ }
+
+ {
+ person p ("", 0);
+ assert (!pq0.execute_one (p) &&
+ p.id_ == 0 && p.name_.empty () && p.age_ == 0);
+ }
+
+ {
+ person p (pq1.execute_value ());
+ assert (p.name_ == "John Doe");
+ }
+ }
}
catch (const odb::exception& e)
{
diff --git a/common/prepared/test.hxx b/common/prepared/test.hxx
index c6e2c1e..571f4b6 100644
--- a/common/prepared/test.hxx
+++ b/common/prepared/test.hxx
@@ -12,9 +12,9 @@
#pragma db object
struct person
{
- person () {}
+ person (): id_ (0) {}
person (const std::string& name, unsigned short age)
- : name_ (name), age_ (age) {}
+ : id_ (0), name_ (name), age_ (age) {}
#pragma db id auto
unsigned long id_;