</li>
{{ end }}
+### Order by PublishDate
+
+ {{ range .Data.Pages.ByPublishDate }}
+ <li>
+ <a href="{{ .Permalink }}">{{ .Title }}</a>
+ <div class="meta">{{ .PublishDate.Format "Mon, Jan 2, 2006" }}</div>
+ </li>
+ {{ end }}
+
### Order by Length
{{ range .Data.Pages.ByLength }}
## Grouping Content
Hugo provides some grouping functions for list pages. You can use them to
-group pages by Section, Date etc.
+group pages by Section, Type, Date etc.
Here are a variety of different ways you can group the content items in
your list templates:
</ul>
{{ end }}
+### Grouping by Page publish date
+
+ {{ range .Data.Pages.GroupByPublishDate "2006-01" }}
+ <h3>{{ .Key }}</h3>
+ <ul>
+ {{ range .Pages }}
+ <li>
+ <a href="{{ .Permalink }}">{{ .Title }}</a>
+ <div class="meta">{{ .PublishDate.Format "Mon, Jan 2, 2006" }}</div>
+ </li>
+ {{ end }}
+ </ul>
+ {{ end }}
+
+### Grouping by Page param
+
+ {{ range .Data.Pages.GroupByParam "param_key" }}
+ <h3>{{ .Key }}</h3>
+ <ul>
+ {{ range .Pages }}
+ <li>
+ <a href="{{ .Permalink }}">{{ .Title }}</a>
+ <div class="meta">{{ .Date.Format "Mon, Jan 2, 2006" }}</div>
+ </li>
+ {{ end }}
+ </ul>
+ {{ end }}
+
+### Grouping by Page param in date format
+
+ {{ range .Data.Pages.GroupByParamDate "param_key" "2006-01" }}
+ <h3>{{ .Key }}</h3>
+ <ul>
+ {{ range .Pages }}
+ <li>
+ <a href="{{ .Permalink }}">{{ .Title }}</a>
+ <div class="meta">{{ .Date.Format "Mon, Jan 2, 2006" }}</div>
+ </li>
+ {{ end }}
+ </ul>
+ {{ end }}
+
### Reversing Key Order
The ordering of the groups is performed by keys in alpha-numeric order (A–Z,
"reflect"
"sort"
"strings"
+ "time"
)
type PageGroup struct {
return p
}
+var (
+ errorType = reflect.TypeOf((*error)(nil)).Elem()
+ pagePtrType = reflect.TypeOf((*Page)(nil))
+)
+
func (p Pages) GroupBy(key string, order ...string) (PagesGroup, error) {
if len(p) < 1 {
return nil, nil
direction = "desc"
}
- ppt := reflect.TypeOf(&Page{}) // *hugolib.Page
-
- ft, ok := ppt.Elem().FieldByName(key)
-
+ var ft interface{}
+ ft, ok := pagePtrType.Elem().FieldByName(key)
if !ok {
- return nil, errors.New("No such field in Page struct")
+ m, ok := pagePtrType.MethodByName(key)
+ if !ok {
+ return nil, errors.New(key + " is neither a field nor a method of Page")
+ }
+ if m.Type.NumIn() != 1 || m.Type.NumOut() == 0 || m.Type.NumOut() > 2 {
+ return nil, errors.New(key + " is a Page method but you can't use it with GroupBy")
+ }
+ if m.Type.NumOut() == 1 && m.Type.Out(0).Implements(errorType) {
+ return nil, errors.New(key + " is a Page method but you can't use it with GroupBy")
+ }
+ if m.Type.NumOut() == 2 && !m.Type.Out(1).Implements(errorType) {
+ return nil, errors.New(key + " is a Page method but you can't use it with GroupBy")
+ }
+ ft = m
}
- tmp := reflect.MakeMap(reflect.MapOf(ft.Type, reflect.SliceOf(ppt)))
+ var tmp reflect.Value
+ switch e := ft.(type) {
+ case reflect.StructField:
+ tmp = reflect.MakeMap(reflect.MapOf(e.Type, reflect.SliceOf(pagePtrType)))
+ case reflect.Method:
+ tmp = reflect.MakeMap(reflect.MapOf(e.Type.Out(0), reflect.SliceOf(pagePtrType)))
+ }
for _, e := range p {
ppv := reflect.ValueOf(e)
- fv := ppv.Elem().FieldByName(key)
- if !fv.IsNil() {
- if !tmp.MapIndex(fv).IsValid() {
- tmp.SetMapIndex(fv, reflect.MakeSlice(reflect.SliceOf(ppt), 0, 0))
+ var fv reflect.Value
+ switch ft.(type) {
+ case reflect.StructField:
+ fv = ppv.Elem().FieldByName(key)
+ case reflect.Method:
+ fv = ppv.MethodByName(key).Call([]reflect.Value{})[0]
+ }
+ if !fv.IsValid() {
+ continue
+ }
+ if !tmp.MapIndex(fv).IsValid() {
+ tmp.SetMapIndex(fv, reflect.MakeSlice(reflect.SliceOf(pagePtrType), 0, 0))
+ }
+ }
+
+ var r []PageGroup
+ for _, k := range sortKeys(tmp.MapKeys(), direction) {
+ r = append(r, PageGroup{Key: k.Interface(), Pages: tmp.MapIndex(k).Interface().([]*Page)})
+ }
+
+ return r, nil
+}
+
+func (p Pages) GroupByParam(key string, order ...string) (PagesGroup, error) {
+ if len(p) < 1 {
+ return nil, nil
+ }
+
+ direction := "asc"
+
+ if len(order) > 0 && (strings.ToLower(order[0]) == "desc" || strings.ToLower(order[0]) == "rev" || strings.ToLower(order[0]) == "reverse") {
+ direction = "desc"
+ }
+
+ var tmp reflect.Value
+ var keyt reflect.Type
+ for _, e := range p {
+ param := e.GetParam(key)
+ if param != nil {
+ if _, ok := param.([]string); !ok {
+ keyt = reflect.TypeOf(param)
+ tmp = reflect.MakeMap(reflect.MapOf(keyt, reflect.SliceOf(pagePtrType)))
+ break
}
- tmp.SetMapIndex(fv, reflect.Append(tmp.MapIndex(fv), ppv))
}
}
+ if !tmp.IsValid() {
+ return nil, errors.New("There is no such a param")
+ }
+
+ for _, e := range p {
+ param := e.GetParam(key)
+ if param == nil || reflect.TypeOf(param) != keyt {
+ continue
+ }
+ v := reflect.ValueOf(param)
+ if !tmp.MapIndex(v).IsValid() {
+ tmp.SetMapIndex(v, reflect.MakeSlice(reflect.SliceOf(pagePtrType), 0, 0))
+ }
+ tmp.SetMapIndex(v, reflect.Append(tmp.MapIndex(v), reflect.ValueOf(e)))
+ }
var r []PageGroup
for _, k := range sortKeys(tmp.MapKeys(), direction) {
return r, nil
}
-func (p Pages) GroupByDate(format string, order ...string) (PagesGroup, error) {
+func (p Pages) groupByDateField(sorter func(p Pages) Pages, formatter func(p *Page) string, order ...string) (PagesGroup, error) {
if len(p) < 1 {
return nil, nil
}
- sp := p.ByDate()
+ sp := sorter(p)
if !(len(order) > 0 && (strings.ToLower(order[0]) == "asc" || strings.ToLower(order[0]) == "rev" || strings.ToLower(order[0]) == "reverse")) {
sp = sp.Reverse()
}
- date := sp[0].Date.Format(format)
+ date := formatter(sp[0])
var r []PageGroup
r = append(r, PageGroup{Key: date, Pages: make(Pages, 0)})
r[0].Pages = append(r[0].Pages, sp[0])
i := 0
for _, e := range sp[1:] {
- date = e.Date.Format(format)
+ date = formatter(e)
if r[i].Key.(string) != date {
r = append(r, PageGroup{Key: date})
i++
}
return r, nil
}
+
+func (p Pages) GroupByDate(format string, order ...string) (PagesGroup, error) {
+ sorter := func(p Pages) Pages {
+ return p.ByDate()
+ }
+ formatter := func(p *Page) string {
+ return p.Date.Format(format)
+ }
+ return p.groupByDateField(sorter, formatter, order...)
+}
+
+func (p Pages) GroupByPublishDate(format string, order ...string) (PagesGroup, error) {
+ sorter := func(p Pages) Pages {
+ return p.ByPublishDate()
+ }
+ formatter := func(p *Page) string {
+ return p.PublishDate.Format(format)
+ }
+ return p.groupByDateField(sorter, formatter, order...)
+}
+
+func (p Pages) GroupByParamDate(key string, format string, order ...string) (PagesGroup, error) {
+ sorter := func(p Pages) Pages {
+ var r Pages
+ for _, e := range p {
+ param := e.GetParam(key)
+ if param != nil {
+ if _, ok := param.(time.Time); ok {
+ r = append(r, e)
+ }
+ }
+ }
+ pdate := func(p1, p2 *Page) bool {
+ return p1.GetParam(key).(time.Time).Unix() < p2.GetParam(key).(time.Time).Unix()
+ }
+ PageBy(pdate).Sort(r)
+ return r
+ }
+ formatter := func(p *Page) string {
+ return p.GetParam(key).(time.Time).Format(format)
+ }
+ return p.groupByDateField(sorter, formatter, order...)
+}
return p
}
+func (p Pages) ByPublishDate() Pages {
+ pubDate := func(p1, p2 *Page) bool {
+ return p1.PublishDate.Unix() < p2.PublishDate.Unix()
+ }
+
+ PageBy(pubDate).Sort(p)
+ return p
+}
+
func (p Pages) ByLength() Pages {
length := func(p1, p2 *Page) bool {
return len(p1.Content) < len(p2.Content)
var WEIGHTED_PAGE_1 = []byte(`+++
weight = "2"
title = "One"
+my_param = "foo"
+my_date = 1979-05-27T07:32:00Z
+++
Front Matter with Ordered Pages`)
var WEIGHTED_PAGE_2 = []byte(`+++
weight = "6"
title = "Two"
+publishdate = "2012-03-05"
+my_param = "foo"
+++
Front Matter with Ordered Pages 2`)
weight = "4"
title = "Three"
date = "2012-04-06"
+publishdate = "2012-04-06"
+my_param = "bar"
+only_one = "yes"
+my_date = 2010-05-27T07:32:00Z
+++
Front Matter with Ordered Pages 3`)
weight = "4"
title = "Four"
date = "2012-01-01"
+publishdate = "2012-01-01"
+my_param = "baz"
+my_date = 2010-05-27T07:32:00Z
+++
Front Matter with Ordered Pages 4. This is longer content`)
t.Errorf("Pages in unexpected order. First should be '%s', got '%s'", "Three", rev[0].Title)
}
+ bypubdate := s.Pages.ByPublishDate()
+
+ if bypubdate[0].Title != "One" {
+ t.Errorf("Pages in unexpected order. First should be '%s', got '%s'", "One", bypubdate[0].Title)
+ }
+
+ rbypubdate := bypubdate.Reverse()
+ if rbypubdate[0].Title != "Three" {
+ t.Errorf("Pages in unexpected order. First should be '%s', got '%s'", "Three", rbypubdate[0].Title)
+ }
+
bylength := s.Pages.ByLength()
if bylength[0].Title != "One" {
t.Errorf("Pages in unexpected order. First should be '%s', got '%s'", "One", bylength[0].Title)
t.Errorf("PageGroup has unexpected number of pages. Third group should have '%d' pages, got '%d' pages", 2, len(rbysection[2].Pages))
}
+ bytype, err := s.Pages.GroupBy("Type", "asc")
+ if err != nil {
+ t.Fatalf("Unable to make PageGroup array: %s", err)
+ }
+ if bytype[0].Key != "sect1" {
+ t.Errorf("PageGroup array in unexpected order. First group key should be '%s', got '%s'", "sect1", bytype[0].Key)
+ }
+ if bytype[1].Key != "sect2" {
+ t.Errorf("PageGroup array in unexpected order. Second group key should be '%s', got '%s'", "sect2", bytype[1].Key)
+ }
+ if bytype[2].Key != "sect3" {
+ t.Errorf("PageGroup array in unexpected order. Third group key should be '%s', got '%s'", "sect3", bytype[2].Key)
+ }
+ if bytype[2].Pages[0].Title != "Four" {
+ t.Errorf("PageGroup has an unexpected page. Third group's data should have '%s', got '%s'", "Four", bytype[0].Pages[0].Title)
+ }
+ if len(bytype[0].Pages) != 2 {
+ t.Errorf("PageGroup has unexpected number of pages. First group should have '%d' pages, got '%d' pages", 2, len(bytype[2].Pages))
+ }
+
bydate, err := s.Pages.GroupByDate("2006-01", "asc")
if err != nil {
t.Fatalf("Unable to make PageGroup array: %s", err)
if len(bydate[0].Pages) != 2 {
t.Errorf("PageGroup has unexpected number of pages. First group should have '%d' pages, got '%d' pages", 2, len(bydate[2].Pages))
}
+
+ bypubdate, err := s.Pages.GroupByPublishDate("2006")
+ if err != nil {
+ t.Fatalf("Unable to make PageGroup array: %s", err)
+ }
+ if bypubdate[0].Key != "2012" {
+ t.Errorf("PageGroup array in unexpected order. First group key should be '%s', got '%s'", "2012", bypubdate[0].Key)
+ }
+ if bypubdate[1].Key != "0001" {
+ t.Errorf("PageGroup array in unexpected order. Second group key should be '%s', got '%s'", "0001", bypubdate[1].Key)
+ }
+ if bypubdate[0].Pages[0].Title != "Three" {
+ t.Errorf("PageGroup has an unexpected page. Third group's pages should have '%s', got '%s'", "Three", bypubdate[0].Pages[0].Title)
+ }
+ if len(bypubdate[0].Pages) != 3 {
+ t.Errorf("PageGroup has unexpected number of pages. First group should have '%d' pages, got '%d' pages", 3, len(bypubdate[0].Pages))
+ }
+
+ byparam, err := s.Pages.GroupByParam("my_param", "desc")
+ if err != nil {
+ t.Fatalf("Unable to make PageGroup array: %s", err)
+ }
+ if byparam[0].Key != "foo" {
+ t.Errorf("PageGroup array in unexpected order. First group key should be '%s', got '%s'", "foo", byparam[0].Key)
+ }
+ if byparam[1].Key != "baz" {
+ t.Errorf("PageGroup array in unexpected order. Second group key should be '%s', got '%s'", "baz", byparam[1].Key)
+ }
+ if byparam[2].Key != "bar" {
+ t.Errorf("PageGroup array in unexpected order. Third group key should be '%s', got '%s'", "bar", byparam[2].Key)
+ }
+ if byparam[2].Pages[0].Title != "Three" {
+ t.Errorf("PageGroup has an unexpected page. Third group's pages should have '%s', got '%s'", "Three", byparam[2].Pages[0].Title)
+ }
+ if len(byparam[0].Pages) != 2 {
+ t.Errorf("PageGroup has unexpected number of pages. First group should have '%d' pages, got '%d' pages", 2, len(byparam[0].Pages))
+ }
+
+ _, err = s.Pages.GroupByParam("not_exist")
+ if err == nil {
+ t.Errorf("GroupByParam didn't return an expected error")
+ }
+
+ byOnlyOneParam, err := s.Pages.GroupByParam("only_one")
+ if err != nil {
+ t.Fatalf("Unable to make PageGroup array: %s", err)
+ }
+ if len(byOnlyOneParam) != 1 {
+ t.Errorf("PageGroup array has unexpected elements. Group length should be '%d', got '%d'", 1, len(byOnlyOneParam))
+ }
+ if byOnlyOneParam[0].Key != "yes" {
+ t.Errorf("PageGroup array in unexpected order. First group key should be '%s', got '%s'", "yes", byOnlyOneParam[0].Key)
+ }
+
+ byParamDate, err := s.Pages.GroupByParamDate("my_date", "2006-01")
+ if err != nil {
+ t.Fatalf("Unable to make PageGroup array: %s", err)
+ }
+ if byParamDate[0].Key != "2010-05" {
+ t.Errorf("PageGroup array in unexpected order. First group key should be '%s', got '%s'", "2010-05", byParamDate[0].Key)
+ }
+ if byParamDate[1].Key != "1979-05" {
+ t.Errorf("PageGroup array in unexpected order. Second group key should be '%s', got '%s'", "1979-05", byParamDate[1].Key)
+ }
+ if byParamDate[1].Pages[0].Title != "One" {
+ t.Errorf("PageGroup has an unexpected page. Second group's pages should have '%s', got '%s'", "One", byParamDate[1].Pages[0].Title)
+ }
+ if len(byParamDate[0].Pages) != 2 {
+ t.Errorf("PageGroup has unexpected number of pages. First group should have '%d' pages, got '%d' pages", 2, len(byParamDate[2].Pages))
+ }
}
var PAGE_WITH_WEIGHTED_TAXONOMIES_2 = []byte(`+++
projects / brevno-suite / hugo / commitdiff