Add a REST spec for the create API (#20924)

The create request now requires that an ID be present.
Currently the clients hard code a create method, but
we should just add a create REST spec so this method
can be autogenerated.

rest-api-spec/src/main/resources/rest-api-spec/api/create.json

@@ -0,0 +1,75 @@
+{
+  "create": {
+    "documentation": "http://www.elastic.co/guide/en/elasticsearch/reference/master/docs-index_.html",
+    "methods": ["PUT"],
+    "url": {
+      "path": "/{index}/{type}/{id}/_create",
+      "paths": ["/{index}/{type}/{id}/_create"],
+      "parts": {
+        "id": {
+          "type" : "string",
+          "required" : true,
+          "description" : "Document ID"
+        },
+        "index": {
+          "type" : "string",
+          "required" : true,
+          "description" : "The name of the index"
+        },
+        "type": {
+          "type" : "string",
+          "required" : true,
+          "description" : "The type of the document"
+        }
+      },
+      "params": {
+        "wait_for_active_shards": {
+          "type" : "string",
+          "description" : "Sets the number of shard copies that must be active before proceeding with the index operation. Defaults to 1, meaning the primary shard only. Set to `all` for all shard copies, otherwise set to any non-negative value less than or equal to the total number of copies for the shard (number of replicas + 1)"
+        },
+        "parent": {
+          "type" : "string",
+          "description" : "ID of the parent document"
+        },
+        "refresh": {
+          "type" : "enum",
+          "options": ["true", "false", "wait_for"],
+          "description" : "If `true` then refresh the affected shards to make this operation visible to search, if `wait_for` then wait for a refresh to make this operation visible to search, if `false` (the default) then do nothing with refreshes."
+        },
+        "routing": {
+          "type" : "string",
+          "description" : "Specific routing value"
+        },
+        "timeout": {
+          "type" : "time",
+          "description" : "Explicit operation timeout"
+        },
+        "timestamp": {
+          "type" : "time",
+          "description" : "Explicit timestamp for the document"
+        },
+        "ttl": {
+          "type" : "time",
+          "description" : "Expiration time for the document"
+        },
+        "version" : {
+          "type" : "number",
+          "description" : "Explicit version number for concurrency control"
+        },
+        "version_type": {
+          "type" : "enum",
+          "options" : ["internal", "external", "external_gte", "force"],
+          "description" : "Specific version type"
+        },
+        "pipeline" : {
+          "type" : "string",
+          "description" : "The pipeline id to preprocess incoming documents with"
+        }
+      }
+    },
+    "body": {
+      "description" : "The document",
+      "required" : true
+    }
+  }
+}