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I have a component in Angular2 hosting the table of users (userTableComponnent) and another component of userDetails. Upon clicking on a row in users table, I want to route to the userDetails. One implementation is to pass the userId only, so in userDetails, I fetch the details of the user with another http get. However, this is redundant, as I grab all the user info in userTableComponent. So what I really need is to pass the User object from userTableComponent to userDetails. Any idea how to achieve it through routing?
You can create a SessionService class and pass it around your App via Dependency Injection.
Once the user is selected you can attach the relative data to the SessionService instance injected via DI and retrieve it in the userDetails Component.
I hope it helps
Passing objects by routing is quite limited. Using a service is the better option. If you provide a service instance by the parent component, then the same instance gets injected in parent and child and you have the shared data available immediately.
See also https://angular.io/docs/ts/latest/cookbook/component-communication.html#!#bidirectional-service
In RC.4 also data for routes was re-introduced How do I pass data in Angular 2 components while using Routing?
来源：https://stackoverflow.com/questions/36994918/passing-objects-in-routing