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is_null() throws for invalid rows

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result_row objects can be constructed with raw result rows representing
the end of the result set. Field values must not be accessed for such
rows. Thus, is_null() now throws an exception when called for a field of
an invalid row.
This commit is contained in:
Roland Bock 2013-08-15 09:32:24 +02:00
parent 7370f098b0
commit e4bcc27463
3 changed files with 24 additions and 3 deletions
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9
include/sqlpp11/boolean.h
View File

@ -95,13 +95,20 @@ namespace sqlpp
bool _is_trivial() const { return value() == false; }
bool is_null() const { return _is_null; }
bool is_null() const
{
if (not _is_valid)
throw exception("accessing is_null in non-existing row");
return _is_null;
}
bool value() const
{
if (not _is_valid)
throw exception("accessing value in non-existing row");
return _value;
}
operator bool() const { return value(); }
private:

9
include/sqlpp11/numeric.h
View File

@ -72,13 +72,20 @@ namespace sqlpp
bool _is_trivial() const { return value() == 0; }
bool is_null() const { return _is_null; }
bool is_null() const
{
if (not _is_valid)
throw exception("accessing is_null in non-existing row");
return _is_null;
}
int64_t value() const
{
if (not _is_valid)
throw exception("accessing value in non-existing row");
return _value;
}
operator int64_t() const { return value(); }
private:

9
include/sqlpp11/text.h
View File

@ -86,13 +86,20 @@ namespace sqlpp
bool operator==(const std::string& rhs) const { return value() == rhs; }
bool operator!=(const std::string& rhs) const { return not operator==(rhs); }
bool is_null() const { return _is_null; }
bool is_null() const
{
if (not _is_valid)
throw exception("accessing is_null in non-existing row");
return _is_null;
}
std::string value() const
{
if (not _is_valid)
throw exception("accessing value in non-existing row");
return _value;
}
operator std::string() const { return value(); }
private: