I'm thinking about moving our API from a standard HTTP endpoint to GraphQL.
On the client we have data tables in which the user can choose what columns they want to have visible.
Users can save their column layout for the next time they open the application.
The problem is the first time such a table is shown, the client requires two things:
What columns has the user saved
The data of these columns for each record
Currently we have a single endpoint returning both of these in JSON.
URL: /contacts/table
{
"columns": ["a", "b", "c"],
"rows": [
{
"a": 0,
"b": 1,
"c": 2
}
]
}
Is there a nice way to get the above working in a GraphQL API?
Some things I've tried:
Have an API that returns key value pairs
"columns": ["a", "b", "c"]
"rows": [
[
{
"key": "a"
"value": 0
},
{
"key": "b"
"value": 1
}
]
]
Problems with this approach:
It has a lot of overhead
It feels like reinventing the wheel seeing as JSON is already key/value based.
Doesn't work well with caching frameworks such as apollo when the same type needs to be accessed in a non-table way
Custom syntax
query {
tables {
contacts {
columns #provideFragment("ContactColumns")
}
}
contacts {
..ContactsColumns
}
}
Problems with this approach:
It's not standard (as far as I know), so it might not work with other tooling.
Related
I have some json data that I would like to filter in a Power Automate Flow.
A simplified version of the json is as follows:
[
{
"ItemId": "1",
"Blah": "test1",
"CustomFieldArray": [
{
"Name": "Code",
"Value": "A"
},
{
"Name": "Category",
"Value": "Test"
}
]
},
{
"ItemId": "2",
"Blah": "test2",
"CustomFieldArray": [
{
"Name": "Code",
"Value": "B"
},
{
"Name": "Category",
"Value": "Test"
}
]
}
]
For example, I wish to filter items based on Name = "Code" and Value = "A". I should be left with the item with ItemId 1 in that case.
I can't figure out how to do this in Power Automate. It would be nice to change the data structure, but this is the way the data is, and I'm trying to work out if this is possible in Power Automate without changing the data itself.
Firstly, I had to fix your JSON, it wasn't complete.
Secondly, filtering on sub array information isn't what I'd call easy. However, to get around the limitations, you can perform a bit of trickery.
Prior to the step above, I create a variable of type Array and called it Array.
In the step above, the left hand side expression is ...
string(item()?['CustomFieldArray'])
... and the contains comparison on the right hand side is simply as you can see, a string with the appropriate filter value ...
{"Name":"Code","Value":"A"}
... it's not an expression or a proper object, just a string.
If you need to enhance it to cater for case sensitive values, just set everything to lower case using the toLower expression on the left.
Although it's hard to see, that will produce your desired result ...
... you can see by the vertical scrollbars that it's reduced the size of the array.
I am using PouchDB (with a Cloudant remote database) to have a local database in a dictionary web app.
I need to have an index with a custom Pashto alphabet order (using Arabic unicode letters).
The localdb.find queries with $gte (alphabetically searching with partial words) do not work well because of the irregular Unicode characters in the Pashto alphabet.
Is it possible to create a custom sort, based on the Pashto alphabet, for an index?
See Mango Query Language
In this reference it is mentioned that:
The most important feature of a view result is that it is sorted by key.
Assume you have a database consisting of docs with a unicodeString field inside each doc. So a sample doc would look like below:
{
"_id":"2018-01-30-18-04-11",
"_rev":"AE19EBC7654",
"title":"Hello elephant",
"unicodeString":"שלום פיל",
}
Now you can have a CouchDB view with a map function like this:
function(doc) {
emit(doc.unicodeString, doc.title); // doc.unicodeString is key
// doc.title is value
}
The above view sorts all the docs inside the database according to its key which is doc.unicodeString. Therefore, if you use the above view, all of your docs would be sorted based on your Unicode string inside docs.
If you have 3 docs in database, when you query the above view, you receive a response result like this in which rows array is sorted according to key in each row:
{
"total_rows": 3,
"offset": 0,
"rows": [
{
"key": "ארץ",
"id": "2017-09-01-09-05-11",
"value": "Earth"
},
{
"key": "בין",
"id": "2015-01-19-11-30-28",
"value": "between"
},
{
"key": "שלום פיל",
"id": "2018-01-30-18-04-11",
"value": "Hello elephant"
}
]
}
I've an object like it (simplified here), Each strain have many chromosomes, that have many locus, that have many features, that have many products, ... Here I just put 1 of each.
The structure in json is:
{
"name": "my strain",
"public": false,
"authorized_users": [1, 23, 51],
"chromosomes": [
{
"name": "C1",
"locus": [
{
"name": "locus1",
"features": [
{
"name": "feature1",
"products": [
{
"name": "product1"
//...
}
]
}
]
}
]
}
]
}
I want to add this object in Elasticsearch, for the moment I've add objects separatly: locus, features and products. It's okay to do a search (I want type a keyword, watch in name of locus, name of features, and name of products), but I need to duplicate data like public and authorized_users, in each subobject.
Can I register the whole object in elasticsearch and just do a search on each locus level, features and products ? And get it individually ? (no return the Strain object)
Yes you can search at any level (ie, with a query like "chromosomes.locus.name").
But as you have arrays at each level, you will have to use nested objects (and nested query) to get exactly what you want, which is a bit more complex:
https://www.elastic.co/guide/en/elasticsearch/reference/current/nested.html
https://www.elastic.co/guide/en/elasticsearch/reference/5.3/query-dsl-nested-query.html
For your last question, no, you cannot get subobjects individually, elastic returns the whole json source object.
If you want only data from subobjects, you will have to use nested aggregations.
All:
I am trying to understand the relationship between Entity Array and Object:
Are they just different format to describe diff structure of data? Or Entity is quite diff from the rest two?
The normalized data result has a structure like {result:,entities:}, are the data structures only defined with schema.Entity put inside entities or so can schema.Array and Object? When I define a schema only use Object and Array, it seems nothing put in entities, I am not sure if it is my schema def fault or this is how normalizr work?
If only schema.Entity() defined data can put into entities, then how can I put an data array into it, something like {0:.., 1:..,2:,}?
For exmaple, I have data like:
var data = [
{
id:"0",
items:[
{
id: "0",
data: {name:"data-0-0"}
},
{
id: "1",
data: {name:"data-0-1"}
}
]
},
{
id:"1",
items:[
{
id: "0",
data: {name:"data-1-0"}
},
{
id: "1",
data: {name:"data-1-1"}
}
]
}
]
const normalizedData = normalize(data, [{items:[{data:{}}]}]);
And the normalized data is like:
{
"entities": {},
"result": {
"0": {
"id": "0",
"items": [
{
"id": "0",
"data": {
"name": "data-1-0"
}
}
]
}
}
}
Thanks
Question: Are they just different format to describe diff structure of data? Or Entity is quite diff from the rest two?
Answer: Yes. An Entity is a singular object that has a unique identifier associated with it. Array and Object are more generic structures that can't be uniquely identified. In your case, it looks like you only need to use Array and Entity for the data you're describing.
Question: Are the data structures only defined with schema? Entity put inside entities?
Answer: Yes.
Simple issue regarding usage of datatables (http://www.datatables.net) and server side data retrieval.
Datatables expects a special format from the server, to be in the root of the response:
{
"sEcho": 1,
"iTotalRecords": "57",
"iTotalDisplayRecords": "57",
"aaData": [
{
"engine": "Gecko",
"browser": "Firefox 1.0",
"platform": "Win 98+ / OSX.2+",
"version": "1.7",
"grade": "A"
},...
]
}
But I want to nest all of this in another place in my json response from the server:
{
myshit: "",
status: "success",
morestuff: "yoyo",
datatables: { here will be all of the json related to datatables }
}
I haven't found a property for this in the API.
The only options I know about, right now, is to define all the columns with the exact nested property they should look for.
Do you know of such a property? or can suggest a good way to achieve this nesting?
Because sAjaxSource expects the dataset in the particular order, you would have to use $.getJSON instead to have the nested layout you described