Allow to use get separately

Update README.md

Author: NazariiStrohush

README.md

@@ -23,6 +23,44 @@ You can have one request and get any nested data you want
   npm i @nazariistrohush/gql-prisma-select
 ```
 
+## Types
+
+### Arguments of `new GQLPrismaSelect(info, options)` constructor
+
+- `info` - `GraphQLResolveInfo` object
+- `options` - `object` with options
+  - `options.get` - `string | string[]` String split by `.` or an array to get custom path of selection (similar to lodash.get)
+  - `options.exclude` - `string[]` Fields to exclude from selection
+    - `__typename` excluded by default (because not exists in prisma model)
+
+### Results of `new GQLPrismaSelect(info, options)`
+
+- `include` - `object` with include object for Prisma
+- `select` - `object` with select object for Prisma
+- `originalInclude` - `object` with original include object (same as `include` in case `get` option is not used)
+- `originalSelect` - `object` with original select object (same as `select` in case `get` option is not used)
+
+### Static methods
+
+- `GQLPrismaSelect.get(selection, path)` - get some specific selections by path
+  - `selection` - `object` with selection ({ include, select } result of `new GQLPrismaSelect(info, options)` constructor)
+  - `path` - `string | string[]` String split by `.` or an array
+    - Used to get specific selection from select/include object
+
+E.g. get different selections from one GQLPrismaSelect constructor call
+
+```ts
+const includeSelect = new GQLPrismaSelect(info);
+const { include, select } = GQLPrismaSelect.get(
+  includeSelect,
+  'collection.User'
+);
+const { include: includePosts, select: selectPosts } = GQLPrismaSelect.get(
+  includeSelect,
+  'collection.Post'
+);
+```
+
 ## Quick example
 
 Get info from your request using `@nestjs/graphql`

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@nazariistrohush/gql-prisma-select",
-  "version": "0.0.19",
+  "version": "0.1.0",
   "description": "Package to get selection according to gql query fields",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/GQLPrismaSelect.ts

@@ -31,7 +31,10 @@ export class GQLPrismaSelect<S = any, I = any> {
     this.originalInclude = res.include;
     this.originalSelect = res.select;
     // Get values in case we want to get a specific value by path or key
-    const customSelection = this.get(params.get, res.select || res.include);
+    const customSelection = GQLPrismaSelect.get(
+      params.get,
+      res.select || res.include
+    );
     const { include, select } = this.selectOrInclude(customSelection);
     this.include = include;
     this.select = select;
@@ -102,7 +105,7 @@ export class GQLPrismaSelect<S = any, I = any> {
     return res;
   }
 
-  private get(_path?: string | string[], _obj?: any) {
+  public static get(_path?: string | string[], _obj?: any) {
     if (!_path?.length) {
       return _obj;
     }
@@ -112,6 +115,6 @@ export class GQLPrismaSelect<S = any, I = any> {
     }
     const [key, ...rest] = path;
     const obj = _obj[key];
-    return this.get(rest, obj.select || obj.include);
+    return GQLPrismaSelect.get(rest, obj.select || obj.include);
   }
 }