#Graphql formatter update
#Graphql formatter Pc

The AlertDialog is wrapped in the now familiar Mutation, and line 63 calls the mutation itself. Lastly, the function onCreate on line 33 is responsible for showing a dialog to ask for the task title and for creating the task itself. GraphQL services should coerce as appropriate given the ID formats they expect. We then call onRefresh to re-run the query and get updated data. GraphQL is agnostic to ID format, and serializes to string to ensure consistency across many formats ID could represent, from small auto-increment numbers, to large 128-bit random numbers, to base64 encoded values, or string values of a format like GUID. It accepts a map with arguments for the mutation ( id and completed, in this case). It will pass RunMutation to its builder function that must be called to execute the mutation. The main difference is that Mutation does not automatically execute the mutation. It is wrapped with the Mutation class, which works pretty much like Query. Now, look at the TaskList widget, specifically, its build function. fetchMore is used when implementing pagination, but we will leave it for now. refetch will re-run the query if we call it, and we do, each time the user toggles a task (also highly inefficient). QueryResult has fields loading and hasException, which we use to determine what to render (lines 85-90). Query will pass the QueryResult and the refetch and fetchMore functions to its builder callback. It has some advantages compared to REST: it solves the over-fetching or under-fetching of data, is strongly typed, and is capable of retrieving multiple and nested data in one go, but it also comes with drawbacks. The gql(getTasksQuery) will parse the query, and pollInterval: 1 means that this query will refresh every second (this is highly inefficient, but will do for now). GraphQL is a query language made to communicate with an API and therefore is an alternative to REST. Query accepts an options argument of type QueryOptions, which sets up the query. Here, we are using the Query widget to run the query and pass the results to its children. Now, examine the build function of the _ListPageState class in line 75. This means we can run queries and mutations from anywhere in the app. By wrapping the whole application in it, we provide the rest of the widgets with the GraphQL client.

The first thing you should notice is the GraphQLProvider on line 11. There were no changes to the UI yet, so the app should look the same.

#Graphql formatter update

The last query will update the completed field on a task with id. The back end we are using will not check for id uniqueness, due to its simplicity. createTaskMutation is a mutation to create tasks (obviously!) and it accepts two parameters: the id of the newly created task and its title. The first one is pretty straightforward: Get all queries with fields id, title, and completed.

#Graphql formatter Pc

If you are running the app on a physical device, you need to replace this address with the local IP address of your PC (or use something like ngrok). The link is using the address because this is the IP of the host computer from inside of the emulator. The second one is the graphql_flutter package we installed earlier. The first one is a core Flutter package that propagates updates down to components.