useQuery.md

useQuery

expo-sqlite-wrapper have hooks that you could use in a components.

The hook is able to tracks changes done globally, so if you change an item in the database useQuery will be able to track the changes and render the component.

Here is how simple it is to use it.

const Name =()=> {
 const [users, dataIsLoading] = 
  DbContext.database.useQuery("Users",
  DbContext.database.querySelector<User>("Users").Where.Column(x=> x.name).StartsWith("t"));

return (
    <>
    {
        users.map((x,i)=> <Text key={i}>{x.name}</Text>)
    }
    </>
)
}

Properties useQuery

tableName

The TableName

query

Could be one of the folowing (SqlLite.Query) | (IReturnMethods<T, D>) | (() => Promise<T[]>

The initiated data.

onDbItemChanged(Optional)

When Changes Happend to the database, useQuery have to request query from the db, and incase the data is big, you could use this instead to skip the request to the database.

eg (items)=> items.filter(x=> x.name.startWith("t"))