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Features: 1) Replace autocomplete input with Select2-based dropdown for enhanced functionality and improved styling; 2) Add support for displaying the initial selection text in the dropdown; 3) Load additional Select2-specific JavaScript and CSS resources dynamically;

Browse source 
Fixes: 1) Correct handling of initial selection when lookup value is invalid or missing;

Extra: 1) Refactor related admin template and Python code to improve readability and maintainability; 2) Align variable names and code style for consistency.
This commit is contained in:
Egor Pavlovich Gorbunov 2025-07-01 18:35:01 +03:00
parent 08dc89ef19
commit 306f54b4a2
2 changed files with 53 additions and 48 deletions
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44
core/admin.py
View file

@ -44,20 +44,32 @@ class RelatedAutocompleteFilter(FieldListFilter):
def __init__(self, field, request, params, model, model_admin, field_path):
super().__init__(field, request, params, model, model_admin, field_path)
self.lookup_kwarg = f"{field_path}__{field.target_field.name}__exact"
self.lookup_val = params.get(self.lookup_kwarg, "")
self.lookup_val = params.get(self.lookup_kwarg, "")
remote = field.remote_field.model._meta
self.app_label = remote.app_label
self.model_name = remote.model_name
self.field_name = field.name
self.field_label = field.verbose_name
remote_opts = field.remote_field.model._meta
base = reverse("admin:autocomplete")
self.autocomplete_url = (
f"{base}"
f"?app_label={remote_opts.app_label}"
f"&model_name={remote_opts.model_name}"
f"&field_name={field.name}"
f"?app_label={self.app_label}"
f"&model_name={self.model_name}"
f"&field_name={self.field_name}"
f"&limit={self.limit}"
)
if self.lookup_val:
try:
obj = field.remote_field.model._default_manager.get(pk=self.lookup_val)
self.initial_text = str(obj)
except field.remote_field.model.DoesNotExist:
self.initial_text = ""
else:
self.initial_text = ""
def expected_parameters(self):
key = f"{self.field_path}__{self.field.target_field.name}__exact"
return [key]
@ -67,15 +79,21 @@ class RelatedAutocompleteFilter(FieldListFilter):
def choices(self, changelist):
yield {
"selected": bool(self.lookup_val),
"query_string": changelist.get_query_string(
({self.lookup_kwarg: self.lookup_val} if self.lookup_val else {}), []
),
"display": _("—"),
"selected": bool(self.lookup_val),
"query_string": changelist.get_query_string(
({self.lookup_kwarg: self.lookup_val}
if self.lookup_val else {}),
[]
),
"display": _("—"),
"autocomplete_url": self.autocomplete_url,
"lookup_kwarg": self.lookup_kwarg,
"lookup_val": self.lookup_val,
"field_label": self.field_label,
"lookup_kwarg": self.lookup_kwarg,
"lookup_val": self.lookup_val,
"app_label": self.app_label,
"model_name": self.model_name,
"field_name": self.field_name,
"field_label": self.field_label,
"initial_text": self.initial_text,
}

57
core/templates/admin/autocomplete_list_filter.html
View file

@ -1,40 +1,27 @@
{% load i18n static %}
<div class="filter-autocomplete">
<input type="hidden"
name="{{ spec.lookup_kwarg }}"
value="{{ spec.lookup_val }}"
id="id_{{ spec.lookup_kwarg }}"/>
<label for="id_autocomplete_{{ spec.lookup_kwarg }}"></label><input type="text"
id="id_autocomplete_{{ spec.lookup_kwarg }}"
placeholder="{% blocktrans with label=spec.field_label %}Search by {{ label }}…{% endblocktrans %}"
style="width:90%;"
data-autocomplete-url="{{ spec.autocomplete_url }}"
data-lookup-kwarg="{{ spec.lookup_kwarg }}"/>
<label for="id_{{ spec.lookup_kwarg }}"></label><select name="{{ spec.lookup_kwarg }}"
id="id_{{ spec.lookup_kwarg }}"
class="admin-autocomplete"
style="width:90%;"
data-ajax--url="{{ spec.autocomplete_url }}"
data-app-label="{{ spec.app_label }}"
data-model-name="{{ spec.model_name }}"
data-field-name="{{ spec.field_name }}"
data-allow-clear="true"
data-placeholder="{% blocktrans with label=spec.field_label %}Search by {{ label }}…{% endblocktrans %}">
{% if spec.lookup_val %}
<option value="{{ spec.lookup_val }}" selected>{{ spec.initial_text }}</option>
{% endif %}
</select>
</div>
<link rel="stylesheet"
href="{% static 'admin/css/vendor/select2/select2.css' %}"/>
<link rel="stylesheet"
href="{% static 'admin/css/autocomplete.css' %}"/>
<script src="{% static 'admin/js/vendor/jquery/jquery.min.js' %}"></script>
<script>
(function ($) {
let $box = $('#id_autocomplete_{{ spec.lookup_kwarg }}');
let $hidden = $('#id_{{ spec.lookup_kwarg }}');
$box.autocomplete({
source: function (req, resp) {
$.getJSON($box.data('autocomplete-url'), {
term: req.term
}, function (data) {
resp(data.results);
});
},
minLength: 2,
select: function (_, ui) {
$hidden.val(ui.item.id);
let qs = {};
qs[$box.data('lookup-kwarg')] = ui.item.id;
window.location.search = $.param(qs);
}
});
})(django.jQuery);
</script>
<script src="{% static 'admin/js/vendor/select2/select2.full.min.js' %}"></script>
<script src="{% static 'admin/js/jquery.init.js' %}"></script>
<script src="{% static 'admin/js/autocomplete.js' %}"></script>