JarCastingBeholder: Play-Slick library for data presentation
Standard part of many application are list of data that is not a effect of simple query from one table but junction and aggregation of data from many tables. Beholder provides support for such elemets.
Features:
- views as table
- declaring filters for data
- support for sorting, filtering on multiple (custom) datatypes
Contributors
Authors:
Feel free to use it, test it and to contribute!
Getting beholder
For latest version (Scala 2.11.7 compatible) use:
// https://mvnrepository.com/artifact/org.virtuslab/beholder
libraryDependencies += "org.virtuslab" %% "beholder" % "1.1.0"
Or see Maven repository for 2.10 and 2.11.
Examples
Lets assume that we created simple entries
case class MachineId(id: Long) extends AnyVal with BaseId
case class UserId(id: Long) extends AnyVal with BaseId
and junction table joined them by ids.
Defining view
Usually for data in view does not came form single table so we have to create view that is materialisation of some query. Beholder provides such utility. We can create Slick's table that operate on view (it is read only).
case class UserMachineView(email: String, system: String, cores: Int)
val usersMachinesQuery = for {
user <- Users
userMachine <- UserMachines if user.id === userMachine.userId
machine <- Machines if machine.id === userMachine.machineId
} yield (user, machine)
val UsersMachineView = FilterableViews.createView(name = "USERS_MACHINE_VIEW",
apply = UserMachineView.apply _,
unapply = UserMachineView.unapply _,
baseQuery = usersMachinesQuery) {
case (user, machine) =>
//naming the fields
("email" -> user.email,
"system" -> machine.system,
"cores" -> machine.cores)
}
UsersMachineView.viewDDL.create
Defining filter
We create a filter by specify table query (view or normal table) and mapping for field
val UsersMachineFilter = new FiltersGenerator[UserMachineView].create(view,
inText,
inText,
inIntField
)
Do the filtering from request
UsersMachineFilter.filterForm.bindFromRequest().fold(
errors => handleError(),
filterData => showResult(UsersMachineFilter.filter(filterData))
)
