# Introduction
Preparing view-filter and view-group introduction in v2 core engine
Moving view from `core-modules` to `metadata-modules`
## What happened
### Created dedicated modules for each view entity:
- ViewFieldModule
- ViewFilterModule
- ViewFilterGroupModule
- ViewGroupModule
- ViewSortModule
### Each module is now completely independent with its own:
- Controller
- Resolver
- Service
- Entity
### Created dedicated abstraction metadata module folder for:
- flat-view-field
- flat-view
### Dependencies
- Eleminated circular dep on ViewModule to all others ones
- Granular import not importing the whole viewModule anymore everywhere
close https://github.com/twentyhq/core-team-issues/issues/1703
# Introduction
Initial motivation here was to migrate the object related records logic
from v1 to v2, please note that now in v2 views aren't records anymore
but core engine entities
## What's done
- Added specific label identifier targeting view field logic
- Handled side effects on viewField creation with lowest position on
object label identifier mutation
- Added viewField relations in field metadate entity + handled
optimistic in builder v2
- Added view relations in object metadata entity + handled optimistic in
builder v2
- Added integration tests covering the side effects and new validation
exceptions
- Sandardized cache computation
- Coverage on object metadata creation side effect on views and view
fields
## Coverage
```ts
PASS test/integration/graphql/suites/view/view-field/object-identifier-update-side-effect-on-view-field.integration-spec.ts
View Field Resolver - Successful object metadata identifier update side effect on view field
✓ should create a view field on label identifier object metadata update if it does not exist on view (7 ms)
✓ Should not allow deleting a label identifier view field (17 ms)
✓ Should not allow destroying a label identifier view field (6 ms)
✓ Should not allow updating a label identifier view field visibility to false (8 ms)
✓ Should not allow creating a view field with a position lower than the label idenfitier view field (180 ms)
✓ Should not allow updated labelIdentifier view field with a position higher than existing other view field (346 ms)
✓ Should allow updated labelIdentifier view field with a position higher than existing other view field (434 ms)
Test Suites: 1 passed, 1 total
Tests: 7 passed, 7 total
Snapshots: 5 passed, 5 total
Time: 4.571 s, estimated 5 s
```
close https://github.com/twentyhq/core-team-issues/issues/1664
Paul Rastoin