php - How do I make this param converter work? -


using symfony2/doctrine orm

i have entity "productcategory".

productcategory ( fields )

  • id (int)
  • displayname (string)

i'm wanting create route param converters. have. according documentation here should work. 

/**   * @route("/products/{category_name}")   * @paramconverter("c", class="appbundle:productcategory", options={"mapping": { "displayname" = "category_name"}})   */ public function viewproductpageaction(productcategory $c) {     return $this->render('templates/view-product.html.twig'); }

so what's going on there? want convert route key "category_name" productcategory entity it's field displayname , assign $c.

seems easy enough. assign category_name displayname field in mapping option. i'm getting error.

unable guess how doctrine instance request information. 500 - logic exception

what reason i'm getting error, , how misinterpreting documentation? in advance.

well close enough. arguments passed mapping in reversed order. right syntax you're looking here this:

/**   * @route("/products/{category_name}")   * @paramconverter("c", class="appbundle:productcategory", options={"mapping": { "category_name" = "displayname"}})   */

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