Add #[schemars(inner(...)] attribute to specify schema for array items (#234)

docs/1.1-attributes.md

@@ -276,6 +276,20 @@ Set the Rust built-in [`deprecated`](https://doc.rust-lang.org/edition-guide/rus
 
 Set the path to the schemars crate instance the generated code should depend on. This is mostly useful for other crates that depend on schemars in their macros.
 
+<h3 id="inner">
+
+`#[schemars(inner(...))]`
+</h3>
+
+Sets properties specified by [validator attributes](#supported-validator-attributes) on items of an array schema. For example:
+
+```rs
+struct Struct {
+    #[schemars(inner(url, regex(pattern = "^https://")))]
+    urls: Vec<String>,
+}
+```
+
 <h3 id="doc">
 
 Doc Comments (`#[doc = "..."]`)

docs/_includes/examples/schemars_attrs.rs

@@ -10,6 +10,8 @@ pub struct MyStruct {
     pub my_bool: bool,
     #[schemars(default)]
     pub my_nullable_enum: Option<MyEnum>,
+    #[schemars(inner(regex(pattern = "^x$")))]
+    pub my_vec_str: Vec<String>,
 }
 
 #[derive(Deserialize, Serialize, JsonSchema)]

docs/_includes/examples/schemars_attrs.schema.json

@@ -4,7 +4,8 @@
   "type": "object",
   "required": [
     "myBool",
-    "myNumber"
+    "myNumber",
+    "myVecStr"
   ],
   "properties": {
     "myBool": {
@@ -26,6 +27,13 @@
       "format": "int32",
       "maximum": 10.0,
       "minimum": 1.0
+    },
+    "myVecStr": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "pattern": "^x$"
+      }
     }
   },
   "additionalProperties": false,