digitalmars.D.learn - VibeD - undefinded identifier

holo (31/31) Jul 23 2017 Hello

Seb (7/38) Jul 23 2017 You need to

holo (12/64) Jul 23 2017 Thank you it solves my problem, but now i'm getting:

Mike Parker (2/3) Jul 23 2017 You need to specify a type here instead of using auto.

holo (11/14) Jul 23 2017 Thanks for reply i fix it. But right now im getting:

Seb (8/24) Jul 23 2017 What are you trying to do with byPair?

holo (41/67) Jul 23 2017 I took this code from example:

holo <holosian gmail.com> writes:

Hello

Im trying to create REST api for my simple web page. My code is 
looking like below:

module service.frontpage;

import vibe.d;

 path("/api")
interface IFrontPageAPI
{
   Json getHome();
}

class FrontPageAPI : IFrontPageAPI
{


   this(auto tmp)
   {
     auto collect = tmp;
   }

   Json getHome()
   {
     logInfo("Getting HomePage from DB");
     Bson query = Bson(["_id" : Bson("homepage")]);
     auto result = collect.find(query);


     logInfo("Iterating results...");
     foreach (i, doc; result.byPair)
     logInfo("Item %d: %s", i, doc.toJson().toString());

     return result.toJson();
   }
}

But when i try to compile it im getting:

source/service/frontpage.d(15,3): Error: undefined identifier 
'tmp', did you mean alias 'cmp'?

Did i miss something?

Jul 23 2017

Seb <seb wilzba.ch> writes:

On Sunday, 23 July 2017 at 15:23:25 UTC, holo wrote:
 Hello

 Im trying to create REST api for my simple web page. My code is 
 looking like below:

 module service.frontpage;

 import vibe.d;

  path("/api")
 interface IFrontPageAPI
 {
   Json getHome();
 }

 class FrontPageAPI : IFrontPageAPI
 {


   this(auto tmp)
   {
     auto collect = tmp;
   }

   Json getHome()
   {
     logInfo("Getting HomePage from DB");
     Bson query = Bson(["_id" : Bson("homepage")]);
     auto result = collect.find(query);


     logInfo("Iterating results...");
     foreach (i, doc; result.byPair)
     logInfo("Item %d: %s", i, doc.toJson().toString());

     return result.toJson();
   }
 }

 But when i try to compile it im getting:

 source/service/frontpage.d(15,3): Error: undefined identifier 
 'tmp', did you mean alias 'cmp'?

 Did i miss something?

You need to
- use Class variables
- use types instead auto (here Mongo collection)
- return a proper Json

Have a look at: https://is.gd/7AMsKs

And play with it - no output means no complication error.

Jul 23 2017

holo <holosian gmail.com> writes:

On Sunday, 23 July 2017 at 15:43:31 UTC, Seb wrote:
 On Sunday, 23 July 2017 at 15:23:25 UTC, holo wrote:
 Hello

 Im trying to create REST api for my simple web page. My code 
 is looking like below:

 module service.frontpage;

 import vibe.d;

  path("/api")
 interface IFrontPageAPI
 {
   Json getHome();
 }

 class FrontPageAPI : IFrontPageAPI
 {


   this(auto tmp)
   {
     auto collect = tmp;
   }

   Json getHome()
   {
     logInfo("Getting HomePage from DB");
     Bson query = Bson(["_id" : Bson("homepage")]);
     auto result = collect.find(query);


     logInfo("Iterating results...");
     foreach (i, doc; result.byPair)
     logInfo("Item %d: %s", i, doc.toJson().toString());

     return result.toJson();
   }
 }

 But when i try to compile it im getting:

 source/service/frontpage.d(15,3): Error: undefined identifier 
 'tmp', did you mean alias 'cmp'?

 Did i miss something?

 You need to
 - use Class variables
 - use types instead auto (here Mongo collection)
 - return a proper Json

 Have a look at: https://is.gd/7AMsKs

 And play with it - no output means no complication error.

Thank you it solves my problem, but now i'm getting:

source/service/frontpage.d(28,30): Error: template 
std.array.byPair cannot deduce function from argument types 
!()(MongoCursor!(Bson, Bson, typeof(null))), candidates are:
/usr/include/dlang/dmd/std/array.d(419,6):        
std.array.byPair(Key, Value)(Value[Key] aa)
source/service/frontpage.d(21,10): Error: function 
frontpage.FrontPageAPI.getHome no return exp; or assert(0); at 
end of function

What is strange it is just copy/paste from example: 
https://github.com/rejectedsoftware/vibe.d/blob/master/examples/mongodb/source/app.d

Jul 23 2017

Mike Parker <aldacron gmail.com> writes:

On Sunday, 23 July 2017 at 15:23:25 UTC, holo wrote:

   this(auto tmp)

You need to specify a type here instead of using auto.

Jul 23 2017

holo <holosian gmail.com> writes:

On Sunday, 23 July 2017 at 16:27:40 UTC, Mike Parker wrote:
 On Sunday, 23 July 2017 at 15:23:25 UTC, holo wrote:

   this(auto tmp)

 You need to specify a type here instead of using auto.

Thanks for reply i fix it. But right now im getting:

../../.dub/packages/vibe-d-0.7.31/vibe-d/source/vibe/http/server.d(286,33):
Deprecation: alias diet.traits.FilterCallback is deprecated - Use
SafeFilterCallback instead.
source/service/frontpage.d(28,30): Error: template 
std.array.byPair cannot deduce function from argument types 
!()(MongoCursor!(Bson, Bson, typeof(null))), candidates are:
/usr/include/dlang/dmd/std/array.d(419,6):        
std.array.byPair(Key, Value)(Value[Key] aa)
source/service/frontpage.d(21,10): Error: function 
frontpage.FrontPageAPI.getHome no return exp; or assert(0); at 
end of function

Jul 23 2017

Seb <seb wilzba.ch> writes:

On Sunday, 23 July 2017 at 16:37:19 UTC, holo wrote:
 On Sunday, 23 July 2017 at 16:27:40 UTC, Mike Parker wrote:
 On Sunday, 23 July 2017 at 15:23:25 UTC, holo wrote:

   this(auto tmp)

 You need to specify a type here instead of using auto.

 Thanks for reply i fix it. But right now im getting:

 ../../.dub/packages/vibe-d-0.7.31/vibe-d/source/vibe/http/server.d(286,33):
Deprecation: alias diet.traits.FilterCallback is deprecated - Use
SafeFilterCallback instead.
 source/service/frontpage.d(28,30): Error: template 
 std.array.byPair cannot deduce function from argument types 
 !()(MongoCursor!(Bson, Bson, typeof(null))), candidates are:
 /usr/include/dlang/dmd/std/array.d(419,6):        
 std.array.byPair(Key, Value)(Value[Key] aa)

What are you trying to do with byPair?
It's only defined for the MongoCursor: 
http://vibed.org/api/vibe.db.mongo.cursor/MongoCursor.byPair

That std.array.byPair shows up means that you are using it for 
something else?

 source/service/frontpage.d(21,10): Error: function 
 frontpage.FrontPageAPI.getHome no return exp; or assert(0); at 
 end of function

I guess you forgot a return here?
Maybe it's easier to post your code again?

Jul 23 2017

holo <holosian gmail.com> writes:

On Sunday, 23 July 2017 at 17:16:44 UTC, Seb wrote:
 On Sunday, 23 July 2017 at 16:37:19 UTC, holo wrote:
 On Sunday, 23 July 2017 at 16:27:40 UTC, Mike Parker wrote:
 On Sunday, 23 July 2017 at 15:23:25 UTC, holo wrote:

   this(auto tmp)

 You need to specify a type here instead of using auto.

 Thanks for reply i fix it. But right now im getting:

 ../../.dub/packages/vibe-d-0.7.31/vibe-d/source/vibe/http/server.d(286,33):
Deprecation: alias diet.traits.FilterCallback is deprecated - Use
SafeFilterCallback instead.
 source/service/frontpage.d(28,30): Error: template 
 std.array.byPair cannot deduce function from argument types 
 !()(MongoCursor!(Bson, Bson, typeof(null))), candidates are:
 /usr/include/dlang/dmd/std/array.d(419,6):        
 std.array.byPair(Key, Value)(Value[Key] aa)

 What are you trying to do with byPair?
 It's only defined for the MongoCursor: 
 http://vibed.org/api/vibe.db.mongo.cursor/MongoCursor.byPair

 That std.array.byPair shows up means that you are using it for 
 something else?

 source/service/frontpage.d(21,10): Error: function 
 frontpage.FrontPageAPI.getHome no return exp; or assert(0); at 
 end of function

 I guess you forgot a return here?
 Maybe it's easier to post your code again?

I took this code from example: 
https://github.com/rejectedsoftware/vibe.d/blob/master/examples/mongodb/source/app.d

And it is looking right now like below:

import vibe.d;
import std.algorithm, std.array;

 path("/api")
interface IFrontPageAPI
{
     Json getHome();
}

class FrontPageAPI : IFrontPageAPI
{
   this(MongoCollection tmp)
   {
       collect = tmp;
   }

   private:
     MongoCollection collect;

   public:
     Json getHome()
     {
       logInfo("Getting HomePage from DB");
       Bson query = Bson(["_id" : Bson("homepage")]);
       auto result = collect.find(query);

       logInfo("Iterating results...");
       foreach (i, doc; result.byPair)
         logInfo("Item %d: %s", i, doc.toJson().toString());

       logInfo("Sending Json");
       return Json(result.map!(a => a.toJson).array);
     }
}

When i remove this piece of code:

       logInfo("Iterating results...");
       foreach (i, doc; result.byPair)
         logInfo("Item %d: %s", i, doc.toJson().toString());

everything is working as expecting.

One more question, what it does mean:

       return Json(result.map!(a => a.toJson).array);

Why we cant just use something like result.toJson?


When i

Jul 23 2017

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