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Installing reducer

All root selectors from the library can be used to update the store with data from backend responses.

For that ngrxEntityRelationshipReducer should be added as a meta reducer. It reacts on reduceFlat and reduceGraph actions, and adds / updates their payload in the store. If the entity exists in the store, then it will be replaced, not merged, unrelated entities will stay as they are.

Redux#

In React with Redux apps, we need to pass rootReducer to ngrxEntityRelationshipReducer, and ngrxEntityRelationshipReducer to createStore.

// App.tsxconst store = createStore(  ngrxEntityRelationshipReducer(    rootReducer,  ),);

NGRX#

In Angular with NGRX apps, we need to provide ngrxEntityRelationshipReducer in metaReducers for our StoreModule.forRoot.

// app.module.tsStoreModule.forRoot(  {    /* ... */  },  {    metaReducers: [      // ...      ngrxEntityRelationshipReducer, // <- add this    ],  },);

You can read about different types of actions and how they normalize data in stores in the next sections.