expose PR counter on Repo API (#9202)

models/repo.go

@@ -368,6 +368,7 @@ func (repo *Repository) innerAPIFormat(e Engine, mode AccessMode, isParent bool)
 		Forks:                     repo.NumForks,
 		Watchers:                  repo.NumWatches,
 		OpenIssues:                repo.NumOpenIssues,
+		OpenPulls:                 repo.NumOpenPulls,
 		DefaultBranch:             repo.DefaultBranch,
 		Created:                   repo.CreatedUnix.AsTime(),
 		Updated:                   repo.UpdatedUnix.AsTime(),

modules/structs/repo.go

@@ -67,6 +67,7 @@ type Repository struct {
 	Forks         int         `json:"forks_count"`
 	Watchers      int         `json:"watchers_count"`
 	OpenIssues    int         `json:"open_issues_count"`
+	OpenPulls     int         `json:"open_pr_counter"`
 	DefaultBranch string      `json:"default_branch"`
 	Archived      bool        `json:"archived"`
 	// swagger:strfmt date-time

templates/swagger/v1_json.tmpl

@@ -10329,6 +10329,11 @@
           "format": "int64",
           "x-go-name": "OpenIssues"
         },
+        "open_pr_counter": {
+          "type": "integer",
+          "format": "int64",
+          "x-go-name": "OpenPulls"
+        },
         "original_url": {
           "type": "string",
           "x-go-name": "OriginalURL"