Add schema_id(), handles different types with the same name (#247)

schemars/tests/expected/same_name.json

@@ -0,0 +1,41 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "Config2",
+  "type": "object",
+  "required": [
+    "a_cfg",
+    "b_cfg"
+  ],
+  "properties": {
+    "a_cfg": {
+      "$ref": "#/definitions/Config"
+    },
+    "b_cfg": {
+      "$ref": "#/definitions/Config2"
+    }
+  },
+  "definitions": {
+    "Config": {
+      "type": "object",
+      "required": [
+        "test"
+      ],
+      "properties": {
+        "test": {
+          "type": "string"
+        }
+      }
+    },
+    "Config2": {
+      "type": "object",
+      "required": [
+        "test2"
+      ],
+      "properties": {
+        "test2": {
+          "type": "string"
+        }
+      }
+    }
+  }
+}

schemars/tests/same_name.rs

@@ -0,0 +1,35 @@
+mod util;
+use schemars::JsonSchema;
+use util::*;
+
+mod a {
+    use super::*;
+
+    #[allow(dead_code)]
+    #[derive(JsonSchema)]
+    pub struct Config {
+        test: String,
+    }
+}
+
+mod b {
+    use super::*;
+
+    #[allow(dead_code)]
+    #[derive(JsonSchema)]
+    pub struct Config {
+        test2: String,
+    }
+}
+
+#[allow(dead_code)]
+#[derive(JsonSchema)]
+pub struct Config2 {
+    a_cfg: a::Config,
+    b_cfg: b::Config,
+}
+
+#[test]
+fn same_name() -> TestResult {
+    test_default_generated_schema::<Config2>("same_name")
+}