I need somehow to store metadata in the can.Model
I use findAll method and receive such JSON:
{
"metadata": {
"color": "red"
},
"data": [
{ "id": 1, "description": "Do the dishes." },
{ "id": 2, "description": "Mow the lawn." },
{ "id": 3, "description": "Finish the laundry." }
]
}
I can work with data like can.Model.List, but I need metadata like a static property or something.
You can use can.Model.parseModels to adjust your response JSON before it's turned into a can.Model.List.
parseModels: function(response, xhr) {
var data = response.data;
var metadata = response.metadata;
var properties;
if(data && data.length && metadata) {
properties = Object.getOwnPropertyNames(metadata);
can.each(data, function(datum) {
can.each(properties, function(property) {
datum[property] = metadata[property];
});
});
}
return response;
}
Here's a functional example in JS Bin: http://jsbin.com/qoxuju/1/edit?js,console
Related
Query:
query SampleQuery {
clients {
totalCount
}
}
Response
{
"data": {
"clients": {
"totalCount": 2
}
},
"extensions": {
"cost": {
"requestedQueryCost": 2,
"actualQueryCost": 2,
"throttleStatus": {
"maximumAvailable": 10000,
"currentlyAvailable": 9998,
"restoreRate": 500
}
}
}
}
I seem to only be able to access the "data" object when using apollo. Is there a way to get access to the "extensions" object?
There isn't an extensions object on the response
var results = await client.query<GetClients>({
(results.data.clients exists, but results.extensions does not).
My client is:
const client = new ApolloClient({
cache: new InMemoryCache(),
link: concat(authMiddleware, httpLink),
});
Are there any data types in GraphQL that can be used to describe a JSON Patch operation?
The structure of a JSON Patch operation is as follows.
{ "op": "add|replace|remove", "path": "/hello", "value": ["world"] }
Where value can be any valid JSON literal or object, such as.
"value": { "name": "michael" }
"value": "hello, world"
"value": 42
"value": ["a", "b", "c"]
op and path are always simple strings, value can be anything.
If you need to return JSON type then graphql have scalar JSON
which return any JSON type where you want to return it.
Here is schema
`
scalar JSON
type Response {
status: Boolean
message: String
data: JSON
}
type Test {
value: JSON
}
type Query {
getTest: Test
}
type Mutation {
//If you want to mutation then pass data as `JSON.stringify` or json formate
updateTest(value: JSON): Response
}
`
In resolver you can return anything in json format with key name "value"
//Query resolver
getTest: async (_, {}, { context }) => {
// return { "value": "hello, world" }
// return { "value": 42 }
// return { "value": ["a", "b", "c"] }
// return anything in json or string
return { "value": { "name": "michael" } }
},
// Mutation resolver
async updateTest(_, { value }, { }) {
// Pass data in JSON.stringify
// value : "\"hello, world\""
// value : "132456"
// value : "[\"a\", \"b\", \"c\"]"
// value : "{ \"name\": \"michael\" }"
console.log( JSON.parse(value) )
//JSON.parse return formated required data
return { status: true,
message: 'Test updated successfully!',
data: JSON.parse(value)
}
},
the only thing you need to specifically return "value" key to identify to get in query and mutation
Query
{
getTest {
value
}
}
// Which return
{
"data": {
"getTest": {
"value": {
"name": "michael"
}
}
}
}
Mutation
mutation {
updateTest(value: "{ \"name\": \"michael\" }") {
data
status
message
}
}
// Which return
{
"data": {
"updateTest": {
"data": null,
"status": true,
"message": "success"
}
}
}
I would like to filter from REST API by nested data. For example this object:
[
{
"name": "Handmade Soft Fish",
"tags": "Rubber, Rubber, Salad",
"categories": [
{
"name": "women",
"id": 2,
"parent_id": 0,
"permalink": "/women"
},
{
"name": "kids",
"id": 3,
"parent_id": 0,
"permalink": "/kids"
}
]
},
{
"name": "Tasty Rubber Soap",
"tags": "Granite, Granite, Chair",
"categories": [
{
"name": "kids",
"id": 3,
"parent_id": 0,
"permalink": "/kids"
}
]
}
]
is comming by GET /api/products?filter[include]=categories
and i would like to get only products which has category name "women". How do this?
LoopBack does not support filters based on related models.
This is a limitation that we have never had bandwidth to solve, unfortunately :(
For more details, see the discussion and linked issues here:
Filter on level 2 properties: https://github.com/strongloop/loopback/issues/517
Filter by properties of related models (use SQL JOIN in queries): https://github.com/strongloop/loopback/issues/683
Maybe you want to get this data by the Category REST API. For example:
GET /api/categories?filter[include]=products&filter[where][name]=woman
The result will be a category object with all products related. To this, will be necessary declare this relation on the models.
Try like this.It has worked for me.
const filter = {
where: {
'categories.name': {
inq: ['women']**strong text**
}
}
};
Pass this filter to request as path parameters and the request would be like bellow
GET /api/categoriesfilter=%7B%22where%22:%7B%categories.name%22:%7B%22inq%22:%5B%women%22%5D%7D%7D%7D
Can you share how it looks like without filter[include]=categorie, please ?
[edit]
after a few questions in comment, I'd build a remote method : in common/models/myModel.js (inside the function) :
function getItems(filter, categorieIds = []) {
return new Promise((resolve, reject) => {
let newInclude;
if (filter.hasOwnProperty(include)){
if (Array.isArray(filter.include)) {
newInclude = [].concat(filter.include, "categories")
}else{
if (filter.include.length > 0) {
newInclude = [].concat(filter.include, "categories");
}else{
newInclude = "categories";
}
}
}else{
newInclude = "categories";
}
myModel.find(Object.assign({}, filter, {include: newInclude}))
.then(data => {
if (data.length <= 0) return resolve(data);
if (categoriesIds.length <= 0) return resolve(data);
// there goes your specific filter on categories
const tmp = data.filter(
item => item.categories.findIndex(
categorie => categorieIds.indexOf(categorie.id) > -1
) > -1
);
return resolve(tmp);
})
}
}
myModel.remoteMethod('getItems', {
accepts: [{
arg: "filter",
type: "object",
required: true
}, {
arg: "categorieIds",
type: "array",
required: true
}],
returns: {arg: 'getItems', type: 'array'}
});
I hope it answers your question...
I am validating model from another model like below
Model.addFavorite = function (data, callbackFn) {
if (data) {
var faviroteModel = this.app.models.Favorite;
var objFavorite = new faviroteModel(data);
objFavorite.isValid(function (isValid) {
if (isValid) {
callbackFn(null, objFavorite);
}
else {
callbackFn(objFavorite.errors);
}
});
}
else callbackFn("Post data required", {});
}
If i do this then I am getting error like below
{
"error": {
"statusCode": 500,
"t": [
"is not a valid date"
]
}
}
It should be with error message like below
{
"error": {
"statusCode": 422,
"name": "ValidationError",
"message": "The `Favorite` instance is not valid. Details: `t` is not a valid date (value: Invalid Date).",
"details": {
"context": "Favorite",
"codes": {
"t": [
"date"
]
},
"messages": {
"t": [
"is not a valid date"
]
}
}
}
}
Can anyone tell me what am i missing here.
How can i achieve this.
https://github.com/strongloop/loopback-datasource-juggler/blob/master/lib/validations.js#L843
You might run into situations where you need to raise a validation
error yourself, for example in a "before" hook or a custom model
method.
if (model.isValid()) {
return callback(null, { success: true });
}
// This line shows how to create a ValidationError
var err = new MyModel.ValidationError(model);
callback(err);
}
Here's what I intend to do.
Request https://reqres.in/api/users/2
Which sends a response as follows.
{
"data": {
"id": 2,
"first_name": "Janet",
"last_name": "Weaver",
"avatar":
"https://s3.amazonaws.com/uifaces/faces/twitter/josephstein/128.jpg"
}
}
Now, I wanna grab the avatar url and make another request, which gives me the image binary.
At the end of this, what I want as output is an Observable that gives me this data.
{
"data": {
"id": 2,
"first_name": "Janet",
"last_name": "Weaver",
"avatar":
"BINARY_GIBBERISH HERE"
}
}
Here's how I approached but can't finish it.
this.http
.get('https://reqres.in/api/users/2')
.switchMap(a => {
const image$ = this.http.get(a.json().data.avatar);
const data = Observable.of(a.json().data);
// Do something here to combine.
})
.subscribe(a => {
// get data here.
});
}
Basically, is there any way to have a structure like this,
{
"data": {
"id": 2,
"first_name": "Janet",
"last_name": "Weaver",
"avatar": [Observable from this.http.get]
}
}
Which then gets resolved to my final data?
You don't need to use switchMap for this and use concatMap or mergeMap instead:
this.http
.get('https://reqres.in/api/users/2')
.concatMap(a => {
const data = a.json().data;
const image$ = this.http.get(data.avatar);
return image$.map(imageData => {
data.avatar = imageData;
return data;
});
})
.subscribe(a => {
// get data here.
});
}