More examples in Mongo (golang-migrate#268)

* adding/removing a new field in the schema * example of updating field value from other fields * added new line at end of files Co-authored-by: Dale Hui <[email protected]>
nicheinc · Jan 3, 2020 · 3001e74 · 3001e74
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diff --git a/database/mongodb/examples/migrations/003_add_new_field.down.json b/database/mongodb/examples/migrations/003_add_new_field.down.json
@@ -0,0 +1,16 @@
+[
+    {
+        "update": "users",
+        "updates": [
+            {
+                "q": {},
+                "u": {
+                    "$unset": {
+                        "status": ""
+                    }
+                },
+                "multi": true
+            }
+        ]
+    }
+]
diff --git a/database/mongodb/examples/migrations/003_add_new_field.up.json b/database/mongodb/examples/migrations/003_add_new_field.up.json
@@ -0,0 +1,16 @@
+[
+    {
+        "update": "users",
+        "updates": [
+            {
+                "q": {},
+                "u": {
+                    "$set": {
+                        "status": "active"
+                    }
+                },
+                "multi": true
+            }
+        ]
+    }
+]
diff --git a/database/mongodb/examples/migrations/004_replace_field_value_from_another_field.down.json b/database/mongodb/examples/migrations/004_replace_field_value_from_another_field.down.json
@@ -0,0 +1,14 @@
+[
+    {
+        "update": "users",
+        "updates": [
+            {
+                "q": {},
+                "u": {
+                    "fullname": ""
+                },
+                "multi": true
+            }
+        ]
+    }
+]
diff --git a/database/mongodb/examples/migrations/004_replace_field_value_from_another_field.up.json b/database/mongodb/examples/migrations/004_replace_field_value_from_another_field.up.json
@@ -0,0 +1,23 @@
+[
+    {
+        "aggregate": "users",
+        "pipeline": [
+            {
+                "$project": {
+                    "_id": 1,
+                    "firstname": 1,
+                    "lastname": 1,
+                    "username": 1,
+                    "password": 1,
+                    "email": 1,
+                    "active": 1,
+                    "fullname": { "$concat": ["$firstname", " ", "$lastname"] }
+                }
+            },
+            {
+                "$out": "users"
+            }
+        ],
+        "cursor": {}
+    }
+]