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Add nil comparison to where tpl function

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`where` template function's internal condition check function always
returns `false` when a target value doesn't exist or it's nil value but
this behavior makes it difficult to filter values which doesn't have a
particular parameter.

To solve it, this adds nil value comparison to the function.
`where Values ".Param.key" nil` like clause can be used for the case
above.

Only "=", "==", "eq", "!=", "<>", "ne" operators are allowed to be used
with `nil`. If an other operator is passed with `nil`, the condition
check function returns `false` like before.

Fix #1232
This commit is contained in:
Tatsushi Demachi
2015-06-28 02:15:42 +09:00
committed by Bjørn Erik Pedersen
parent 033a13e10e
commit dd732e84f4
2 changed files with 40 additions and 9 deletions
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27
tpl/template_funcs_test.go
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@@ -673,6 +673,7 @@ func TestCheckCondition(t *testing.T) {
"",
expect{true, false},
},
{reflect.ValueOf(nil), reflect.ValueOf(nil), "", expect{true, false}},
{reflect.ValueOf(123), reflect.ValueOf(456), "!=", expect{true, false}},
{reflect.ValueOf("foo"), reflect.ValueOf("bar"), "!=", expect{true, false}},
{
@@ -681,6 +682,7 @@ func TestCheckCondition(t *testing.T) {
"!=",
expect{true, false},
},
{reflect.ValueOf(123), reflect.ValueOf(nil), "!=", expect{true, false}},
{reflect.ValueOf(456), reflect.ValueOf(123), ">=", expect{true, false}},
{reflect.ValueOf("foo"), reflect.ValueOf("bar"), ">=", expect{true, false}},
{
@@ -943,6 +945,31 @@ func TestWhere(t *testing.T) {
{A: "a", B: "b"}, {A: "e", B: "f"},
},
},
{
sequence: []map[string]int{
{"a": 1, "b": 2}, {"a": 3}, {"a": 5, "b": 6},
},
key: "b", op: "", match: nil,
expect: []map[string]int{
{"a": 3},
},
},
{
sequence: []map[string]int{
{"a": 1, "b": 2}, {"a": 3}, {"a": 5, "b": 6},
},
key: "b", op: "!=", match: nil,
expect: []map[string]int{
{"a": 1, "b": 2}, {"a": 5, "b": 6},
},
},
{
sequence: []map[string]int{
{"a": 1, "b": 2}, {"a": 3}, {"a": 5, "b": 6},
},
key: "b", op: ">", match: nil,
expect: []map[string]int{},
},
{sequence: (*[]TstX)(nil), key: "A", match: "a", expect: false},
{sequence: TstX{A: "a", B: "b"}, key: "A", match: "a", expect: false},
{sequence: []map[string]*TstX{{"foo": nil}}, key: "foo.B", match: "d", expect: false},