mongodb · alcaeus · Dec 22, 2023 · Dec 21, 2023 · Dec 21, 2023 · Dec 21, 2023
diff --git a/generator/config/expression/add.yaml b/generator/config/expression/add.yaml
@@ -2,7 +2,10 @@
 name: $add
 link: 'https://www.mongodb.com/docs/manual/reference/operator/aggregation/add/'
 type:
-    - resolvesToNumber
+    - resolvesToInt
+    - resolvesToLong
+    - resolvesToDouble
+    - resolvesToDecimal
     - resolvesToDate
 encode: array
 description: |

diff --git a/generator/config/expression/mergeObjects.yaml b/generator/config/expression/mergeObjects.yaml
@@ -0,0 +1,16 @@
+# $schema: ../schema.json
+name: $mergeObjects
+link: 'https://www.mongodb.com/docs/manual/reference/operator/aggregation/mergeObjects/'
+type:
+    - resolvesToObject
+encode: single
+description: |
+    Combines multiple documents into a single document.
+arguments:
+    -
+        name: document
+        type:
+            - resolvesToObject
+        variadic: array
+        description: |
+            Any valid expression that resolves to a document.
diff --git a/generator/config/expression/subtract.yaml b/generator/config/expression/subtract.yaml
@@ -2,7 +2,10 @@
 name: $subtract
 link: 'https://www.mongodb.com/docs/manual/reference/operator/aggregation/subtract/'
 type:
-    - resolvesToNumber
+    - resolvesToInt
+    - resolvesToLong
+    - resolvesToDouble
+    - resolvesToDecimal
     - resolvesToDate
 encode: array
 description: |

diff --git a/generator/config/expression/zip.yaml b/generator/config/expression/zip.yaml
@@ -26,6 +26,7 @@ arguments:
         name: defaults
         type:
             - array
+        optional: true
         description: |
             An array of default element values to use if the input arrays have different lengths. You must specify useLongestLength: true along with this field, or else $zip will return an error.
             If useLongestLength: true but defaults is empty or not specified, $zip uses null as the default value.

diff --git a/generator/config/query/expr.yaml b/generator/config/query/expr.yaml
@@ -2,7 +2,7 @@
 name: $expr
 link: 'https://www.mongodb.com/docs/manual/reference/operator/query/expr/'
 type:
-    - fieldQuery
+    - query
 encode: single
 description: |
     Allows use of aggregation expressions within the query language.

diff --git a/src/Builder/Expression/AddOperator.php b/src/Builder/Expression/AddOperator.php
diff --git a/src/Builder/Expression/FactoryTrait.php b/src/Builder/Expression/FactoryTrait.php
diff --git a/src/Builder/Expression/MergeObjectsOperator.php b/src/Builder/Expression/MergeObjectsOperator.php
diff --git a/src/Builder/Expression/SubtractOperator.php b/src/Builder/Expression/SubtractOperator.php
diff --git a/src/Builder/Expression/ZipOperator.php b/src/Builder/Expression/ZipOperator.php
diff --git a/src/Builder/Query/ExprOperator.php b/src/Builder/Query/ExprOperator.php