Update gates.md

docs/gates.md

@@ -85,60 +85,60 @@ The following operators assist in evaluating documents:
 The @exists operator will look for values that do or do not exist:  
 
 ```
-@{ secret: { @exists: true}
-@{ secret: { @exists: false}
+@{ $secret: { @exists: true}
+@{ $secret: { @exists: false}
 ```
 
 The @eq and @ne operator will look for values match or do not match a value:  
 
 ```
-@{ gender: { @ne: "male" } }
-@{ name: { @eq: "kerri" } }
+@{ $gender: { @ne: "male" } }
+@{ $name: { @eq: "kerri" } }
 ```
 The @in operator will look for equal values that match anything specified in an array:  
 
 ```
-@{ rank: { @in: [ "warrior", "scholar", "sage" ] } }
+@{ $rank: { @in: [ "warrior", "scholar", "sage" ] } }
 ```
 
 The @nin operator will look for equal values that do NOT match anything in an array:  
 
 ```
-@{ rank: { @nin: [ "novice", "precept", "learner" ] } }
+@{ $rank: { @nin: [ "novice", "precept", "learner" ] } }
 ```
 
 The @all operator for matching ALL the elements in an array:  
 
 ```
-@{ items: { @all: [ "bread", "nut butter", "jam" ] } }
+@{ $items: { @all: [ "bread", "nut butter", "jam" ] } }
 ```
 
 The @elemMatch operator for matching ANY element in an array:
 
 ```
-@{ items: { @elemMatch: { "crowbar", "key", "spell", "explosive" } } }
+@{ $items: { @elemMatch: { "crowbar", "key", "spell", "explosive" } } }
 ```
 
 The @and operator logically combines two or more queries:  
 
 ```
-@{ @and: [ { age: { @gt: 12 } }, { age: { @exists: true } } ] }
+@{ @and: [ { age: { @gt: 12 } }, { $age: { @exists: true } } ] }
 ```
 (equivalent to)  
 ```
-@{ { age: { @gt: 12, @exists: true } }
+@{ { $age: { @gt: 12, @exists: true } }
 ```
 
 The @or operator logically combines two or more queries:  
 
 ```
-@{ @or: [ { age: { @gt: 12 } }, { age: { @exists: false } } ] }
+@{ @or: [ { $age: { @gt: 12 } }, { $age: { @exists: false } } ] }
 ```
 
 The @nor operator logically combines two or more queries:  
 
 ```
-@{ @nor: [ { age: { @lt: 12 } }, { age: { @exists: false } } ] }
+@{ @nor: [ { $age: { @lt: 12 } }, { $age: { @exists: false } } ] }
 ```
 
 
@@ -147,34 +147,34 @@ The @nor operator logically combines two or more queries:
 Search by regular expression:  
 
 ```
-@{ name: { @regex: /^M.*/}}
+@{ $name: { @regex: /^M.*/}}
 ```
 
 Regex options: case insensitive:  
 
 ```
-@{ name: { @regex: /^jan.*/, @options: "i"}}
+@{ $name: { @regex: /^jan.*/, @options: "i"}}
 ```
 
 Find by elements in array:
 This matches documents that contain all of these array elements:  
 
 ```
-@{ protection: { @all: "helmet", "armor" }}
+@{ $protection: { @all: "helmet", "armor" }}
 ```
 (equivalent to)
 ```
-{ @and: [ { protection: "helmet" }, { protection: "armor" } ] }
+{ @and: [ { $protection: "helmet" }, { $protection: "armor" } ] }
 ```
 
 Match on any element in the array:  
 
 ```
-@{ skills: "negotiation"}
+@{ $skills: "negotiation"}
 ```
 
 Match on inequality:  
 
 ```
-@{ strength: { @gt: 18 } }
+@{ $strength: { @gt: 18 } }
 ```