I'm trying some basic API Connect tutorials on IBM's platform (running locally using loopback) and have got completely stuck at an early point.
I've built a basic API service with some in-memory data and setter / getter functions. I've then built a separate API which takes two GET parameters and uses one of my getter functions to perform a search based on two criteria. When I run it, I successfully get a response with the following JSON object:
[{"itemId":1,"charge":9,"itemSize":2,"id":2}]
I've then tried to add a piece of server logic that modifies the response data - at this point, I'm just trying to add an extra field. I've added a Javascript component in the Assemble view and included the following code (taken from a tutorial), which I thought should modify the message body returned by the API while still passing it through:
//APIC: get the payload
var json = apim.getvariable('message.body');
//console.error("json %s", JSON.stringify(json));
//same: code to inject new attribute
json.platform = 'Powered by IBM API Connect';
//APIC: set the payload
//message.body = json;
apim.setvariable('message.body', json);
Instead of getting an extra JSON parameter ("platform"), all I get is a 500 error when I call the service. I'm guessing that I'm doing something fundamentally wrong, but all the docs suggest these are the right variable names to use.
You can't access json.platform but at that point json variable is json type. Are you sure that you can add a property to a json type variable if your json object lacks of that property? I mean: What if you first parse the json variable of json type to a normal object, then add new property, and finally stringify to json type again for body assigning purposes?
var json = JSON.parse(apim.getvariable('message.body')); //convert to normal object
json.platform = 'Powered by IBM API Connect'; //add new property
apim.setvariable('message.body', JSON.stringify(json)); //convert to json again before setting as body value
You need to get the context in some determined format, and in this function do your logic. For example if your message is in json you need to do:
apim.readInputAsJSON(function (error, json) {
if (error)
{
// handle error
apim.error('MyError', 500, 'Internal Error', 'Some error message');
}
else
{
//APIC: get the payload
var json = apim.getvariable('message.body');
//console.error("json %s", JSON.stringify(json));
if(json){
//same: code to inject new attribute
json.platform = 'Powered by IBM API Connect';
//APIC: set the payload
//message.body = json;
apim.setvariable('message.body', json);
}
}
});
Reference:
IBM Reference
You have the message.body empty, put a invoke/proxy policy before your gateway/javascript policy for example.
I have my NODE-RED schemma:
following string result from my "Function" node my node:
msg.payload : string[63]
"{"random":{"date":"22:55","random":21},"time":{"time":"22:52"}}"
This is the code of my "Function Node":
msg.payload.random=context.global.randomandtime;
msg.payload.time=context.global.time;
return msg;
I need to put in "part of the string" (not all) like this =>{"date":"22:55","random":21} and show it in my browser like a webpage but not using html tags.
Like this:
22:55
21
Any help will be wellcome.
I have added template(Mustache) and I am traying to bring data to it,(Note:http response is already in schemme but not shown here)
I am traying to bring data here (template). But I get error.
The Mustache template body is:
This is the payload: {{#payload.randomandandtime.random}} !
But I have back this error back:
2017-5-18 16:18:00node: Mustachemsg : string[56]
"Unclosed section "payload.randomandandtime.random" at 59"
In browser I get
502 Bad Gateway: Registered endpoint failed to handle the request.
Even If I change it only payload.randomandandtime I get empty:
payload.randomandandtime
In browser & console:
Messsage received back: (empty)
This is the payload: !
Finally I solved in this way.
I make all in one Global varaible instead 2 global variables.
I passed it to mustache template and in Mustache I worked with context in order to get it.
General Scheme:
Then in recoverydata:
msg.payload = context.global.get("randomtime");
In My Mustache:
`{{#payload.random}}
Last random number request returned {{&payload.random}}, which was received
at {{&payload.randomtime.times}}{{/payload.random}}
{{/payload}}`
The resul of it is a Webservice not using HTML and this is:
url https://....../page
"Time last server time request received at 13:14 Last random number request returned 94, which was received at 13:14"
I am having json file like this. It contains some data.
[{\"Frequency\":\"Building 1\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":46,\"Value1\":26,\"Value2\":22},{\"Name\":\"food\",\"Value\":32,\"Value1\":26,\"Value2\":12}]},{\"Frequency\":\"Building 2\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":48,\"Value1\":26,\"Value2\":23},{\"Name\":\"food\",\"Value\":34,\"Value1\":33,\"Value2\":12}]},{\"Frequency\":\"Building 3\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":57,\"Value1\":22,\"Value2\":24},{\"Name\":\"food\",\"Value\":42,\"Value1\":16,\"Value2\":11}]},{\"Frequency\":\"Building 4\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":59,\"Value1\":26,\"Value2\":33},{\"Name\":\"food\",\"Value\":44,\"Value1\":26,\"Value2\":35}]},{\"Frequency\":\"Building 5\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":62,\"Value1\":26,\"Value2\":11},{\"Name\":\"food\",\"Value\":48,\"Value1\":26,\"Value2\":3}]},{\"Frequency\":\"Building 6\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":62,\"Value1\":26,\"Value2\":21},{\"Name\":\"food\",\"Value\":47,\"Value1\":26,\"Value2\":24}]},{\"Frequency\":\"Building 7\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":58,\"Value1\":26,\"Value2\":22},{\"Name\":\"food\",\"Value\":43,\"Value1\":26,\"Value2\":22}]},{\"Frequency\":\"Building 8\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":48,\"Value1\":26,\"Value2\":2},{\"Name\":\"food\",\"Value\":34,\"Value1\":26,\"Value2\":33}]}]
I want to store this json file into dataset in d3.js. or
I have given all data are static into my code. I want to give these data from json file to d3.js can any one give me example.
my expected result is
dataset = JSON.parse("[{\"Frequency\":\"Building 1\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":46,\"Value1\":26,\"Value2\":22},{\"Name\":\"food\",\"Value\":32,\"Value1\":26,\"Value2\":12}]},{\"Frequency\":\"Building 2\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":48,\"Value1\":26,\"Value2\":23},{\"Name\":\"food\",\"Value\":34,\"Value1\":33,\"Value2\":12}]},{\"Frequency\":\"Building 3\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":57,\"Value1\":22,\"Value2\":24},{\"Name\":\"food\",\"Value\":42,\"Value1\":16,\"Value2\":11}]},{\"Frequency\":\"Building 4\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":59,\"Value1\":26,\"Value2\":33},{\"Name\":\"food\",\"Value\":44,\"Value1\":26,\"Value2\":35}]},{\"Frequency\":\"Building 5\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":62,\"Value1\":26,\"Value2\":11},{\"Name\":\"food\",\"Value\":48,\"Value1\":26,\"Value2\":3}]},{\"Frequency\":\"Building 6\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":62,\"Value1\":26,\"Value2\":21},{\"Name\":\"food\",\"Value\":47,\"Value1\":26,\"Value2\":24}]},{\"Frequency\":\"Building 7\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":58,\"Value1\":26,\"Value2\":22},{\"Name\":\"food\",\"Value\":43,\"Value1\":26,\"Value2\":22}]},{\"Frequency\":\"Building 8\",\"Data\":[{\"Name\":\"Medicine\",\"Value\":48,\"Value1\":26,\"Value2\":2},{\"Name\":\"food\",\"Value\":34,\"Value1\":26,\"Value2\":33}]}]");
inside the bracket my data should be come i dont know how to do this can any tell me how to do this.
before i tried this but it is not working.
d3.json("D3json.json", function(error, data) {
var datas = data;
})
here is my jsfiddle example: Click here to see the example
Thanks
Vinoth S
If I understood your question correctly, you are trying to dynamically load JSON data in contrast to having it hard-coded in your file.
Here is an example how to do it: http://bl.ocks.org/Jverma/887877fc5c2c2d99be10
In general, you have to execute the drawing part after you successfully loaded the data (within the callback function of d3.json())
We are trying to create an entity that has date attributes via an odata service. Backend is an sap system. This entity has only 3 key attributes plus a bunch of other attributes. We have identified that dates in the keys are the root cause of the problem.
Keys:
Pernr type string,
begda type datetime
endda type datetime.
The code below, (which does not work), has been severely simplified when trying to troubleshoot the issue. At the moment, it reads an entity from an entity set and immediately tries to create one with exactly the same data.
Code:
var oODataModel = new sap.ui.model.odata.ODataModel("/sap/opu/odata/sap/Z_PERSONAL_DATA_SRV/");
//Test entity to be saved
var entity = null;
//Handler for read error
var handleReadE = function (oEvent){
alert("error");
};
//Handler for read success
var handleRead = function (oEvent){
//Get the data read from backend
entity = oEvent.results[0];
//Try to create a new entity with same data
oODataModel.create('/PersDataSet', entity, null, function(){
alert("Create successful");
},function(oError){
alert("Create failed", oError);
});
};
oODataModel.read("/PersDataSet", null, [], true, handleRead, handleReadE);
In the gateway error log, an xml parsing error appears. In this log, we can see the request data and it can be seen that the dates are transported with String types. These dates are defined in the service as DateTimes so the request is rejected.
Example:
<m:properties>
<d:Pernr m:type="Edm.String">00000001</d:Pernr>
<d:Endda m:type="Edm.String">9999-12-31T00:00:00</d:Endda>
<d:Begda m:type="Edm.String">1979-05-23T00:00:00</d:Begda>
When the entity is read, the backend does not send any type information. It sends like the following example:
<m:properties>
<d:Pernr>72010459</d:Pernr>
<d:Endda>9999-12-31T00:00:00</d:Endda>
<d:Begda>1876-07-21T00:00:00</d:Begda>
And, indeed, if we try to save the same info without the type=".." it works. So the problem are the incorrect types ODataModel.create adds to the xml.
My question is:
Can I tell ODataModel.create to not add this type info? It is not doing a good job inferring the types.
Can anyone share an example reading and writing dates through odata?
Thank you very much in advance.
the data returned from oODataModel.read is raw, before you post you need to parse it
var handleRead = function (oEvent){
//Get the data read from backend
entity = oEvent.results[0];
var newEntity = jQuery.extend({},entity);
delete newEntity.__metadata;
newEntity.Begda = new Date(entity.Begda);
newEntity.Endda = new Date(entity.Endda);
//Try to create a new entity with same data
oODataModel.create('/PersDataSet', newEntity, null, function(){
why not use json instead of xml?
Thanks all for the help.
We got this working accounting for the following:
The problem of the wrong types appended to the attributes comes from the read itself. The object returned by read has a __metadata attribute which describes the values. In this object the dates are set with type=edm.string, even when the service says they are DateTime. To me this is a bug of the .read function.
When trying to use the same object to save, create sees the __metatada on the entry and uses those values, producing type edm.string type for the dates. This caused the request to be rejected. Manually changing these __metadata.properties...type to Edm.DateTime makes it work.
In the end, we did the following:
Dates are parsed manually from the Odata response, creating a js Date
object from the strings in format "yyyy-mm-ddT00:00:00", to make it work with control bindings. When we want to save, the reverse is done.
The object to be created is a new object with
only the attributes we care (no __metadata)
I tried unsuccessful to separate JSON data from an array of buffer receiving from websocket which look like this.
{"type":"string","data":{"UklGRkIjAABXRUJQVlA4IDYjAACQswCdASqrAfAAPm0wlUemI"}}
[object ArrayBuffer]
the objective is to read them separately with proper function. My old method is parse the JSON first. If fail, pass through another function.
The reason I send them in both formats is that converting JSON data to an array or array to JSON would increase file size around three fold.
The best practice is to send them separately.
However, at the terminal I read JSON data with
var json = JSON.parse(e.data);
and read the ArrayBuffer with DataView method.
The app works properly on the surface, but if you check at console.log there are too many Uncaugth Error.
It also blocks data flow at one point, causing the stream overflow not very smooth.
Thanks for any suggestions in advance.
Got it:
if ((typeof data == 'object')) {
// this would return ArrayBuffer
} else {
// this would return JSON
}