Hi All,

   Currently we are testing various json module such as "std.json, std_data_json, vibe.data.json and asdf", the below code works perfectely while use  "std_data_json or vibe.data.json" but not working as expected when we use "asdf" and throwing the below error, hence request your help on the same.

Error:

source/app.d(12,2): Error: invalid foreach aggregate jv.opIndex(["items"][]), define opApply(), range primitives, or use .tupleof

Code:

import std.stdio: writeln;
import vibe.data.json;           // works
//import asdf;                   // Does not work.
import std.conv: to;

void main()
{
 string apidata = `{"items":[{"name":"T10","hostname":"test1","type":[{"typeValue":"TD,dev@dev.com,DEVt"},{"typeno":"000"}]},{"name":"T11","hostname":"test2","type":[{"typeValue":"TF,qas@qas.com,QAS"},{"typeno":"100"}]},{"name":"T11","hostname":"test3","type":[{"typeValue":"TP,prd@prd.com,PRD"},{"typeno":"101"}]}]}`;
 auto jv = parseJson(apidata);
 foreach(j; jv["items"]){
    writeln(j["name"].toString());
 }
}

Vino.B

On Sunday, 25 October 2020 at 06:05:27 UTC, Vino wrote:
> Hi All,
>
>    Currently we are testing various json module such as "std.json, std_data_json, vibe.data.json and asdf", the below code works perfectely while use  "std_data_json or vibe.data.json" but not working as expected when we use "asdf" and throwing the below error, hence request your help on the same.
>
> Error:
>
> source/app.d(12,2): Error: invalid foreach aggregate jv.opIndex(["items"][]), define opApply(), range primitives, or use .tupleof

Maybe library author didn't implement opApply, so you have to iterate using range primitives empty, front, popFront, or handle data using algorithms.

You can check examples on the project page https://github.com/libmir/asdf

On Sunday, 25 October 2020 at 06:05:27 UTC, Vino wrote:
> Hi All,
>
>    Currently we are testing various json module such as "std.json, std_data_json, vibe.data.json and asdf", the below code works perfectely while use  "std_data_json or vibe.data.json" but not working as expected when we use "asdf" and throwing the below error, hence request your help on the same.

The API's are different. You can't just expect one to work with the api of the other.

Asdf is a bit more strict in that you have to specify whether you intent to iterate a json object (with `.byKeyValue()`) or a json array (with `.byElement()`).

Also the way you fetch values out of it is different. There is `.get!T(default)` that requires a default value in case it is empty (undefined), or `cast(T)field` if you assume there is a value and want an exception throw if not.

----

/+dub.sdl:
dependency "asdf" version="~>0.6.6"
+/
import std.stdio: writeln;
import asdf;
import std.conv: to;

void main()
{
 string apidata = `{"items":[{"name":"T10","hostname":"test1","type":[{"typeValue":"TD,dev@dev.com,DEVt"},{"typeno":"000"}]},{"name":"T11","hostname":"test2","type":[{"typeValue":"TF,qas@qas.com,QAS"},{"typeno":"100"}]},{"name":"T11","hostname":"test3","type":[{"typeValue":"TP,prd@prd.com,PRD"},{"typeno":"101"}]}]}`;
 auto jv = parseJson(apidata);
 foreach(j; jv["items"].byElement()){
    writeln(j["name"].get!string("default"));
 }
}

On Sunday, 25 October 2020 at 06:05:27 UTC, Vino wrote:
> Hi All,
>
>    Currently we are testing various json module such as "std.json, std_data_json, vibe.data.json and asdf", the below code works perfectely while use  "std_data_json or vibe.data.json" but not working as expected when we use "asdf" and throwing the below error, hence request your help on the same.
>
> [...]

Hi Vino,

byElement should be used here for ASDF.

foreach(j; jv["items"].byElement)

http://asdf.libmir.org/asdf_asdf.html#.Asdf.byElement

On Sunday, 25 October 2020 at 08:22:06 UTC, 9il wrote:
> On Sunday, 25 October 2020 at 06:05:27 UTC, Vino wrote:
>> Hi All,
>>
>>    Currently we are testing various json module such as "std.json, std_data_json, vibe.data.json and asdf", the below code works perfectely while use  "std_data_json or vibe.data.json" but not working as expected when we use "asdf" and throwing the below error, hence request your help on the same.
>>
>> [...]
>
> Hi Vino,
>
> byElement should be used here for ASDF.
>
> foreach(j; jv["items"].byElement)
>
> http://asdf.libmir.org/asdf_asdf.html#.Asdf.byElement

Hi All,

  Thank you for your help, and now need your suggestion as the below code is working and it also prints an additional value which is not expected, so request your help on how to avoid the additional value,

Code:
import std.stdio: writeln;
import asdf: parseJson;
import std.conv: to;
import std.range: takeExactly;
import std.array: split;

void main()
{
 string apidata = `{"items":
  [
    {"name":"T01","hostname":"test01","pool":"Development","type":
    [{"Value":"D,dev@dev.com,DEV"},{"Value":"000"}]},
    {"name":"T02","hostname":"test02","pool":"Quality","type":
    [{"Value":"Q,qas@qas.com,QAS"},{"Value":"100"}]},
    {"name":"T03","hostname":"test03","pool":"Production","type":
    [{"Value":"P,prd@prd.com,PRD"},{"Value":"100"}]}
  ]
}`;
 auto jv = parseJson(apidata);
 foreach(j; jv["items"].byElement()){
    foreach(i; j["type"].byElement().takeExactly(1)) {
       writeln(i["Value"].get!string("default").split(",")[1]);
    }
 }
}

Output:
dev@dev.com
qas@qas.com
prd@prd.com
[]   // additional value which is not expected

From,
Vino.B

On Monday, 26 October 2020 at 09:43:44 UTC, Vino wrote:
> On Sunday, 25 October 2020 at 08:22:06 UTC, 9il wrote:
>> [...]
>
> Hi All,
>
>   Thank you for your help, and now need your suggestion as the below code is working and it also prints an additional value which is not expected, so request your help on how to avoid the additional value,
>
> [...]

Hi All,

  Sorry, I was able to find the issue as there was an additional writeln in the code hence the additional output was printed.

From,
Vino.B