Add front-end support for multi-column grid sorting
user must ctrl-click column header to engage multi-sort
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Lance Edgar
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commit
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@ -830,10 +830,10 @@ class Grid(object):
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if self.sortable:
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self.active_sorters = []
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for i in range(1, settings['sorters.length'] + 1):
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self.active_sorters.append((
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settings[f'sorters.{i}.key'],
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settings[f'sorters.{i}.dir'],
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))
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self.active_sorters.append({
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'field': settings[f'sorters.{i}.key'],
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'order': settings[f'sorters.{i}.dir'],
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})
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if self.pageable:
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self.pagesize = settings['pagesize']
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self.page = settings['page']
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@ -1229,9 +1229,14 @@ class Grid(object):
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if not self.active_sorters:
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return data
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# TODO: is there a better way to check for SA sorting?
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if self.model_class:
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# convert sort settings into a 'sortspec' for use with sa-filters
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full_spec = []
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for sortkey, sortdir in self.active_sorters:
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for sorter in self.active_sorters:
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sortkey = sorter['field']
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sortdir = sorter['order']
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sortfunc = self.sorters.get(sortkey)
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if sortfunc:
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spec = {
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@ -1240,7 +1245,6 @@ class Grid(object):
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'field': sortfunc._column.name,
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'direction': sortdir or 'asc',
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}
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# spec.sortkey = sortkey
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full_spec.append(spec)
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# apply joins needed for this sort spec
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@ -1252,6 +1256,26 @@ class Grid(object):
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return apply_sort(data, full_spec)
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else:
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# not a SQLAlchemy grid, custom sorter
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assert len(self.active_sorters) < 2
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sortkey = self.active_sorters[0]['field']
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sortdir = self.active_sorters[0]['order'] or 'asc'
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# Cannot sort unless we have a sort function.
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sortfunc = self.sorters.get(sortkey)
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if not sortfunc:
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return data
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# apply joins needed for this sorter
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if sortkey in self.joiners and sortkey not in self.joined:
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data = self.joiners[sortkey](data)
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self.joined.add(sortkey)
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return sortfunc(data, sortdir)
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def paginate_data(self, data):
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"""
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Paginate the given data set according to current settings, and return
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@ -202,9 +202,25 @@
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% endif
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% if grid.sortable:
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:default-sort="sortingPriority[0]"
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backend-sorting
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@sort="onSort"
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@sorting-priority-removed="sortingPriorityRemoved"
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## TODO: there is a bug (?) which prevents the arrow from
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## displaying for simple default single-column sort. so to
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## work around that, we *disable* multi-sort until the
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## component is mounted. seems to work for now..see also
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## https://github.com/buefy/buefy/issues/2584
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:sort-multiple="allowMultiSort"
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## nb. specify default sort only if single-column
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:default-sort="backendSorters.length == 1 ? [backendSorters[0].field, backendSorters[0].order] : null"
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## nb. otherwise there may be default multi-column sort
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:sort-multiple-data="sortingPriority"
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## user must ctrl-click column header to do multi-sort
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sort-multiple-key="ctrlKey"
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% endif
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% if grid.click_handlers:
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@ -353,7 +369,25 @@
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lastItem: ${json.dumps(grid_data['last_item'] if grid.pageable else None)|n},
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% if grid.sortable:
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## TODO: there is a bug (?) which prevents the arrow from
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## displaying for simple default single-column sort. so to
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## work around that, we *disable* multi-sort until the
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## component is mounted. seems to work for now..see also
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## https://github.com/buefy/buefy/issues/2584
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allowMultiSort: false,
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## nb. this contains all truly active sorters
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backendSorters: ${json.dumps(grid.active_sorters)|n},
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## nb. whereas this will only contain multi-column sorters,
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## but will be *empty* for single-column sorting
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% if len(grid.active_sorters) > 1:
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sortingPriority: ${json.dumps(grid.active_sorters)|n},
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% else:
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sortingPriority: [],
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% endif
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% endif
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## filterable: ${json.dumps(grid.filterable)|n},
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@ -395,6 +429,15 @@
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},
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},
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mounted() {
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## TODO: there is a bug (?) which prevents the arrow from
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## displaying for simple default single-column sort. so to
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## work around that, we *disable* multi-sort until the
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## component is mounted. seems to work for now..see also
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## https://github.com/buefy/buefy/issues/2584
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this.allowMultiSort = true
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},
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methods: {
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% if grid.click_handlers:
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@ -455,9 +498,9 @@
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getBasicParams() {
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let params = {}
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% if grid.sortable:
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for (let i = 1; i <= this.sortingPriority.length; i++) {
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params['sort'+i+'key'] = this.sortingPriority[i-1][0]
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params['sort'+i+'dir'] = this.sortingPriority[i-1][1]
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for (let i = 1; i <= this.backendSorters.length; i++) {
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params['sort'+i+'key'] = this.backendSorters[i-1].field
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params['sort'+i+'dir'] = this.backendSorters[i-1].order
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}
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% endif
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% if grid.pageable:
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@ -537,14 +580,45 @@
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this.loadAsyncData()
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},
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onSort(field, order) {
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this.sortingPriority = [[field, order]]
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onSort(field, order, event) {
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if (event.ctrlKey) {
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// engage or enhance multi-column sorting
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let sorter = this.backendSorters.filter(i => i.field === field)[0]
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if (sorter) {
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sorter.order = sorter.order === 'desc' ? 'asc' : 'desc'
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} else {
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this.backendSorters.push({field, order})
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}
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this.sortingPriority = this.backendSorters
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} else {
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// sort by single column only
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this.backendSorters = [{field, order}]
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this.sortingPriority = []
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}
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// always reset to first page when changing sort options
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// TODO: i mean..right? would we ever not want that?
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this.currentPage = 1
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this.loadAsyncData()
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},
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sortingPriorityRemoved(field) {
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// prune field from active sorters
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this.backendSorters = this.backendSorters.filter(
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(sorter) => sorter.field !== field)
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// nb. must keep active sorter list "as-is" even if
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// there is only one sorter; buefy seems to expect it
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this.sortingPriority = this.backendSorters
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this.loadAsyncData()
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},
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resetView() {
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this.loading = true
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