FIX: Deleting characters on category hashtag was not triggering autocomplete.

app/assets/javascripts/discourse/lib/autocomplete.js.es6

@@ -359,7 +359,7 @@ export default function(options) {
             return true;
           }
         }
-        prevIsGood = /[a-zA-Z\.]/.test(prev);
+        prevIsGood = /[a-zA-Z\.-]/.test(prev);
       }
     }
 

app/assets/javascripts/discourse/models/category.js.es6

@@ -298,11 +298,18 @@ Category.reopenClass({
     }
 
     const emptyTerm = (term === "");
+    let slugTerm = term;
+
+    if (!emptyTerm) {
+      term = term.toLowerCase();
+      slugTerm = term;
+      term = term.replace(/-/g, " ");
+    }
+
     const categories = Category.listByActivity();
     const length = categories.length;
     var i;
     var data = [];
-    term = term.toLowerCase();
 
     const done = () => {
       return data.length === limit;
@@ -311,7 +318,10 @@ Category.reopenClass({
     for (i = 0; i < length && !done(); i++) {
       const category = categories[i];
       if ((emptyTerm && !category.get('parent_category_id')) ||
-          (!emptyTerm && category.get('name').toLowerCase().indexOf(term) === 0)) {
+          (!emptyTerm &&
+           (category.get('name').toLowerCase().indexOf(term) === 0 ||
+            category.get('slug').toLowerCase().indexOf(slugTerm) === 0))) {
+
         data.push(category);
       }
     }
@@ -320,7 +330,10 @@ Category.reopenClass({
       for (i = 0; i < length && !done(); i++) {
         const category = categories[i];
 
-        if ((!emptyTerm && category.get('name').toLowerCase().indexOf(term) > 0)) {
+        if (!emptyTerm &&
+            (category.get('name').toLowerCase().indexOf(term) > 0 ||
+             category.get('slug').toLowerCase().indexOf(slugTerm) > 0)) {
+
           if (data.indexOf(category) === -1) data.push(category);
         }
       }

test/javascripts/models/category-test.js.es6

@@ -126,26 +126,22 @@ test('postCountStats', function() {
   equal(result.length, 0, "should show nothing");
 });
 
-test('search', () => {
+test('search with category name', () => {
-  const result = (term, opts) => {
-    return Category.search(term, opts).map((category) => category.get('id'));
-  };
-
   const store = createStore(),
-        category1 = store.createRecord('category', { id: 1, name: 'middle term' }),
+        category1 = store.createRecord('category', { id: 1, name: 'middle term', slug: 'different-slug' }),
-        category2 = store.createRecord('category', { id: 2, name: 'middle term' });
+        category2 = store.createRecord('category', { id: 2, name: 'middle term', slug: 'another-different-slug' });
 
   sandbox.stub(Category, "listByActivity").returns([category1, category2]);
 
-  deepEqual(result('term', { limit: 0 }), [], "returns an empty array when limit is 0");
+  deepEqual(Category.search('term', { limit: 0 }), [], "returns an empty array when limit is 0");
-  deepEqual(result(''), [category1.get('id'), category2.get('id')], "orders by activity if no term is matched");
+  deepEqual(Category.search(''), [category1, category2], "orders by activity if no term is matched");
-  deepEqual(result('term'), [category1.get('id'), category2.get('id')], "orders by activity");
+  deepEqual(Category.search('term'), [category1, category2], "orders by activity");
 
   category2.set('name', 'TeRm start');
-  deepEqual(result('tErM'), [category2.get('id'), category1.get('id')], "ignores case of category name and search term");
+  deepEqual(Category.search('tErM'), [category2, category1], "ignores case of category name and search term");
 
   category2.set('name', 'term start');
-  deepEqual(result('term'), [category2.get('id'), category1.get('id')], "orders matching begin with and then contains");
+  deepEqual(Category.search('term'), [category2, category1], "orders matching begin with and then contains");
 
   sandbox.restore();
 
@@ -154,21 +150,35 @@ test('search', () => {
 
   sandbox.stub(Category, "listByActivity").returns([read_restricted_category, category1, child_category1, category2]);
 
-  deepEqual(result(''),
+  deepEqual(Category.search(''),
-            [category1.get('id'), category2.get('id'), read_restricted_category.get('id')],
+            [category1, category2, read_restricted_category],
             "prioritize non read_restricted and does not include child categories when term is blank");
 
-  deepEqual(result('', { limit: 3 }),
+  deepEqual(Category.search('', { limit: 3 }),
-            [category1.get('id'), category2.get('id'), read_restricted_category.get('id')],
+            [category1, category2, read_restricted_category],
             "prioritize non read_restricted and does not include child categories categories when term is blank with limit");
 
-  deepEqual(result('term'),
+  deepEqual(Category.search('term'),
-            [child_category1.get('id'), category2.get('id'), category1.get('id'), read_restricted_category.get('id')],
+            [child_category1, category2, category1, read_restricted_category],
             "prioritize non read_restricted");
 
-  deepEqual(result('term', { limit: 3 }),
+  deepEqual(Category.search('term', { limit: 3 }),
-            [child_category1.get('id'), category2.get('id'), read_restricted_category.get('id')],
+            [child_category1, category2, read_restricted_category],
             "prioritize non read_restricted with limit");
 
   sandbox.restore();
 });
+
+test('search with category slug', () => {
+  const store = createStore(),
+        category1 = store.createRecord('category', { id: 1, name: 'middle term', slug: 'different-slug' }),
+        category2 = store.createRecord('category', { id: 2, name: 'middle term', slug: 'another-different-slug' });
+
+  sandbox.stub(Category, "listByActivity").returns([category1, category2]);
+
+  deepEqual(Category.search('different-slug'), [category1, category2], "returns the right categories");
+  deepEqual(Category.search('another-different'), [category2], "returns the right categories");
+
+  category2.set('slug', 'ANOTher-DIFfereNT');
+  deepEqual(Category.search('anOtHer-dIfFeREnt'), [category2], "ignores case of category slug and search term");
+});