Fixed django#1724 -- Renamed "patch" to "pull request"

This follows Django ticket # 35894

Author: bmispelon

dashboard/fixtures/dashboard_production_metrics.json

@@ -11,7 +11,7 @@
     "model": "dashboard.category",
     "pk": 2,
     "fields": {
-        "name": "Patches",
+        "name": "Pull requests",
         "position": 2
     }
 },
@@ -51,7 +51,7 @@
     "model": "dashboard.tracticketmetric",
     "pk": 2,
     "fields": {
-        "name": "Patches needing review",
+        "name": "PRs needing review",
         "slug": "patches",
         "category": 2,
         "position": 3,
@@ -67,7 +67,7 @@
     "model": "dashboard.tracticketmetric",
     "pk": 3,
     "fields": {
-        "name": "Doc. patches needing review",
+        "name": "Doc. PRs needing review",
         "slug": "doc-patches",
         "category": 2,
         "position": 4,

dashboard/fixtures/dashboard_test_data.json

@@ -10,7 +10,7 @@
     {
         "fields": {
             "position": 2,
-            "name": "Patches"
+            "name": "Pull requests"
         },
         "model": "dashboard.category",
         "pk": 2
@@ -51,7 +51,7 @@
         "fields": {
             "category": 2,
             "show_on_dashboard": true,
-            "name": "Patches needing review",
+            "name": "PRs needing review",
             "period": "instant",
             "show_sparkline": true,
             "query": "status=!closed&needs_better_patch=0&needs_tests=0&needs_docs=0&has_patch=1&stage=Accepted",
@@ -67,7 +67,7 @@
         "fields": {
             "category": 2,
             "show_on_dashboard": true,
-            "name": "Doc. patches needing review",
+            "name": "Doc. PRs needing review",
             "period": "instant",
             "show_sparkline": true,
             "query": "status=!closed&needs_better_patch=0&component=Documentation&needs_tests=0&needs_docs=0&has_patch=1&stage=Accepted",

dashboard/migrations/0003_rename_patch_to_pr.py

@@ -0,0 +1,50 @@
+from django.db import migrations
+
+CATEGORY_RENAMES = {
+    "Patches": "Pull requests",
+}
+
+TRACMETRIC_RENAMES = {
+    "Patches needing review": "PRs needing review",
+    "Doc. patches needing review": "Doc. PRs needing review",
+}
+
+
+def _reverse(d):
+    """
+    Reverse the given dict (values become keys and vice-versa).
+    """
+    return {v: k for k, v in d.items()}
+
+
+def rename(apps, schema_editor):
+    Category = apps.get_model("dashboard", "Category")
+    TracTicketMetric = apps.get_model("dashboard", "TracTicketMetric")
+
+    for old, new in CATEGORY_RENAMES.items():
+        Category.objects.filter(name=old).update(name=new)
+
+    for old, new in TRACMETRIC_RENAMES.items():
+        TracTicketMetric.objects.filter(name=old).update(name=new)
+
+
+def rename_backwards(apps, schema_editor):
+    Category = apps.get_model("dashboard", "Category")
+    TracTicketMetric = apps.get_model("dashboard", "TracTicketMetric")
+
+    for old, new in _reverse(CATEGORY_RENAMES).items():
+        Category.objects.filter(name=old).update(name=new)
+
+    for old, new in _reverse(TRACMETRIC_RENAMES).items():
+        TracTicketMetric.objects.filter(name=old).update(name=new)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dashboard', '0002_delete_rssfeedmetric_create_githubsearchcountmetric'),
+    ]
+
+    operations = [
+        migrations.RunPython(rename, rename_backwards),
+    ]