mirror of
https://github.com/gohugoio/hugo.git
synced 2024-12-29 16:41:01 +00:00
ccdd08d57a
This enables `AND` (`intersect`) and `OR` (`union`) filters when combined with `where`.
Example:
```go
{{ $pages := where .Site.RegularPages "Type" "not in" (slice "page" "about") }}
{{ $pages := $pages | union (where .Site.RegularPages "Params.pinned" true) }}
{{ $pages := $pages | intersect (where .Site.RegularPages "Params.images" "!=" nil) }}
```
The above fetches regular pages not of `page` or `about` type unless they are pinned. And finally, we exclude all pages with no `images` set in Page params.
Fixes #3174
134 lines
3.1 KiB
Go
134 lines
3.1 KiB
Go
// Copyright 2017 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package collections
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import (
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"errors"
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"fmt"
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"reflect"
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"time"
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)
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var (
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zero reflect.Value
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errorType = reflect.TypeOf((*error)(nil)).Elem()
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timeType = reflect.TypeOf((*time.Time)(nil)).Elem()
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)
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func numberToFloat(v reflect.Value) (float64, error) {
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switch kind := v.Kind(); {
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case isFloat(kind):
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return v.Float(), nil
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case isInt(kind):
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return float64(v.Int()), nil
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case isUint(kind):
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return float64(v.Uint()), nil
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case kind == reflect.Interface:
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return numberToFloat(v.Elem())
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default:
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return 0, fmt.Errorf("Invalid kind %s in numberToFloat", kind)
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}
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}
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// There are potential overflows in this function, but the downconversion of
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// int64 etc. into int8 etc. is coming from the synthetic unit tests for Union etc.
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// TODO(bep) We should consider normalizing the slices to int64 etc.
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func convertNumber(v reflect.Value, to reflect.Kind) (reflect.Value, error) {
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var n reflect.Value
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if isFloat(to) {
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f, err := toFloat(v)
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if err != nil {
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return n, err
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}
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switch to {
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case reflect.Float32:
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n = reflect.ValueOf(float32(f))
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default:
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n = reflect.ValueOf(float64(f))
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}
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} else if isInt(to) {
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i, err := toInt(v)
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if err != nil {
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return n, err
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}
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switch to {
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case reflect.Int:
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n = reflect.ValueOf(int(i))
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case reflect.Int8:
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n = reflect.ValueOf(int8(i))
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case reflect.Int16:
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n = reflect.ValueOf(int16(i))
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case reflect.Int32:
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n = reflect.ValueOf(int32(i))
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case reflect.Int64:
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n = reflect.ValueOf(int64(i))
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}
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} else if isUint(to) {
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i, err := toUint(v)
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if err != nil {
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return n, err
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}
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switch to {
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case reflect.Uint:
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n = reflect.ValueOf(uint(i))
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case reflect.Uint8:
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n = reflect.ValueOf(uint8(i))
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case reflect.Uint16:
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n = reflect.ValueOf(uint16(i))
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case reflect.Uint32:
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n = reflect.ValueOf(uint32(i))
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case reflect.Uint64:
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n = reflect.ValueOf(uint64(i))
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}
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}
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if !n.IsValid() {
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return n, errors.New("invalid values")
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}
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return n, nil
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}
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func isNumber(kind reflect.Kind) bool {
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return isInt(kind) || isUint(kind) || isFloat(kind)
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}
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func isInt(kind reflect.Kind) bool {
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switch kind {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return true
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default:
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return false
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}
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}
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func isUint(kind reflect.Kind) bool {
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switch kind {
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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return true
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default:
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return false
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}
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}
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func isFloat(kind reflect.Kind) bool {
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switch kind {
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case reflect.Float32, reflect.Float64:
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return true
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default:
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return false
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}
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}
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