Autounbox json

Fixes #187

NEWS.md

@@ -1,5 +1,9 @@
 # httr 0.6.1.9000
 
+* `POST(encode = 'json')` now automatically turns length-1 vectors into json
+  scalars. To prevent this automatic "unboxing", wrap the vector in `I()` 
+  (#187).
+
 # httr 0.6.1
 
 * Correctly parse headers with multiple `:`, thanks to @mmorgan (#180).

R/body.R

@@ -35,7 +35,7 @@ body_config <- function(body = NULL, encode = "form", type = NULL)  {
   if (encode == "form") {
     body_raw(compose_query(body), "application/x-www-form-urlencoded")
   } else if (encode == "json") {
-    body_raw(jsonlite::toJSON(body), "application/json")
+    body_raw(jsonlite::toJSON(body, auto_unbox = TRUE), "application/json")
   } else if (encode == "multipart") {
     # For multipart, rely on RCurl .postForm function to make it possible
     # to intermingle on-disk and in-memory content.

R/http-post.r

@@ -20,7 +20,10 @@
 #'
 #'   For "multipart", list elements can be strings or objects created by
 #'   \code{\link{upload_file}}. For "form", elements are coerced to strings
-#'   and escaped, use \code{I()} to prevent double-escaping.
+#'   and escaped, use \code{I()} to prevent double-escaping. For "json",
+#'   parameters are automatically "unboxed" (i.e. length 1 vectors are
+#'   converted to scalars). To preserve a length 1 vector as a vector,
+#'   wrap in \code{I()}.
 #' @param multipart Deprecated. \code{TRUE} = \code{encode = "multipart"},
 #'   \code{FALSE} = {encode = "form"}.
 #'   Files can not be uploaded when \code{FALSE}.

man/PATCH.Rd

@@ -40,7 +40,10 @@ with \code{\link{config}}.}
 
   For "multipart", list elements can be strings or objects created by
   \code{\link{upload_file}}. For "form", elements are coerced to strings
-  and escaped, use \code{I()} to prevent double-escaping.}
+  and escaped, use \code{I()} to prevent double-escaping. For "json",
+  parameters are automatically "unboxed" (i.e. length 1 vectors are
+  converted to scalars). To preserve a length 1 vector as a vector,
+  wrap in \code{I()}.}
 
 \item{multipart}{Deprecated. \code{TRUE} = \code{encode = "multipart"},
 \code{FALSE} = {encode = "form"}.

man/POST.Rd

@@ -40,7 +40,10 @@ with \code{\link{config}}.}
 
   For "multipart", list elements can be strings or objects created by
   \code{\link{upload_file}}. For "form", elements are coerced to strings
-  and escaped, use \code{I()} to prevent double-escaping.}
+  and escaped, use \code{I()} to prevent double-escaping. For "json",
+  parameters are automatically "unboxed" (i.e. length 1 vectors are
+  converted to scalars). To preserve a length 1 vector as a vector,
+  wrap in \code{I()}.}
 
 \item{multipart}{Deprecated. \code{TRUE} = \code{encode = "multipart"},
 \code{FALSE} = {encode = "form"}.

man/PUT.Rd

@@ -40,7 +40,10 @@ with \code{\link{config}}.}
 
   For "multipart", list elements can be strings or objects created by
   \code{\link{upload_file}}. For "form", elements are coerced to strings
-  and escaped, use \code{I()} to prevent double-escaping.}
+  and escaped, use \code{I()} to prevent double-escaping. For "json",
+  parameters are automatically "unboxed" (i.e. length 1 vectors are
+  converted to scalars). To preserve a length 1 vector as a vector,
+  wrap in \code{I()}.}
 
 \item{multipart}{Deprecated. \code{TRUE} = \code{encode = "multipart"},
 \code{FALSE} = {encode = "form"}.