QxOrm 1.4.9
C++ Object Relational Mapping library
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is_valid_primary_key.h
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31
32#ifndef _QX_IS_VALID_PRIMARY_KEY_H_
33#define _QX_IS_VALID_PRIMARY_KEY_H_
34
35#ifdef _MSC_VER
36#pragma once
37#endif
38
46namespace qx {
47namespace trait {
48namespace detail {
49
54template <typename T>
56{ static inline bool get(const T & t) { Q_UNUSED(t); qAssert(false); return false; } };
57
58template <>
60{ static inline bool get(const short & t) { return (t != 0); } };
61
62template <>
64{ static inline bool get(const int & t) { return (t != 0); } };
65
66template <>
68{ static inline bool get(const long & t) { return (t != 0); } };
69
70template <>
71struct is_valid_primary_key<long long>
72{ static inline bool get(const long long & t) { return (t != 0); } };
73
74template <>
75struct is_valid_primary_key<QString>
76{ static inline bool get(const QString & t) { return (! t.isEmpty()); } };
77
78template <>
79struct is_valid_primary_key<QByteArray>
80{ static inline bool get(const QByteArray & t) { return (! t.isEmpty()); } };
81
82template <>
84{ static inline bool get(const std::string & t) { return (! t.empty()); } };
85
86template <>
87struct is_valid_primary_key<std::wstring>
88{ static inline bool get(const std::wstring & t) { return (! t.empty()); } };
89
90template <>
91struct is_valid_primary_key<QVariant>
92{
93 static inline bool get(const QVariant & t)
94 {
95 if (t.type() == QVariant::ByteArray) { return qx::trait::detail::is_valid_primary_key<QByteArray>::get(t.toByteArray()); }
96 if (t.type() == QVariant::String) { return qx::trait::detail::is_valid_primary_key<QString>::get(t.toString()); }
97 return (! t.isNull() && (t.toLongLong() != 0));
98 }
99};
100
101} // namespace detail
102
103template <typename T>
106
107} // namespace trait
108} // namespace qx
109
110#endif // _QX_IS_VALID_PRIMARY_KEY_H_
#define qAssert(x)
Definition QxMacro.h:52
bool is_valid_primary_key(const T &t)
Root namespace for all QxOrm library features.
qx::trait::is_valid_primary_key<T>(const T & t) : return true if t can be a valid primary key to be i...