Mathematica: GOTCHA/LIMITATION: Changing the value of an Entity in an expression-based EntityStore loaded from a CloudObject does not update the CloudObject. You have to push the EntityStore back to the CloudObject. It is not like a "live" connection.

This page identifies a possible issue, concern, error, limitation, or bug!
Webel IT Australia promotes the amazing Mathematica tool and the powerful Wolfram Language and offers professional Mathematica services for computational computing and data analysis. Our Mathematica tips, issue tracking, and wishlist is offered here most constructively to help improve the tool and language and support the Mathematica user community.
DISCLAIMER: Wolfram Research does not officially endorse analysis by Webel IT Australia.
Icon class
icon_class
far fa-sticky-note
icon_class_computed
far fa-sticky-note
Note kind
GOTCHA
ISSUE
LIMITATION
Policy level
INFORMATIVE
Mathematica keywords
Entity
EntityStore
EntityProperty
EntityValue
ExternalEvaluate
PersistentSymbol
PersistenceLocation
Keywords

Note that this is specifically about a purely expression-basedEntityStore (as opposed to a database-backed EntityStore, which has additional limitations).

Changing the value of an Entity in an expression-based EntityStore loaded from a CloudObject does not update the CloudObject. You have to push the EntityStore back to the CloudObject using PersistentSymbol.

That is, an EntityStore loaded from a CloudObject does not represent a "live" connection (such as a connection to a database), which is to assume that it is designed to be such, but it is a serious limitation for practical work for some situations.

Compare with Databin and Wolfram DataDrop which does automatically synchronise (although Databin has a different purpose and is not a replacement for EntityStore).
Visit also:
Mathematica: GOTCHA: If you pull an EntityStore from a CloudObject with PersistentSymbol it caches and will not update if invoked again even if the CloudObject for the EntityStore has changed. Use instead CloudGet.
Mathematica: GOTCHA/LIMITATION: RelationalDatabase and DatabaseReference are NOT supported in the Wolfram Cloud for "public" accounts, not even for Premium Plan (Commercial)! It is only optionally offered on the Wolfram Enterprise Private Cloud (EPC).
Mathematica: GOTCHA: Setting the value of a property of an Entity using EntityValue[e,"property"] where 'e' is an Entity does NOT work with a relational database backed EntityStore, which undermines half the point of a relational database bridge!
Relates to
Related notes
[GOTCHA, ISSUE, LIMITATION]{INFORMATIVE} Mathematica: GOTCHA/LIMITATION: RelationalDatabase and DatabaseReference are NOT supported in the Wolfram Cloud for "public" accounts, not even for Premium Plan (Commercial)! It is only optionally offered on the Wolfram Enterprise Private Cloud (EPC).
[GOTCHA, ISSUE, LIMITATION]{INFORMATIVE} Mathematica: GOTCHA: Setting the value of a property of an Entity using EntityValue[e,"property"] where 'e' is an Entity does NOT work with a relational database backed EntityStore, which undermines half the point of a relational database bridge!
Related notes (backlinks)
Related snippets (extracts)
Visit also
Mathematica and Wolfram Language zone
Visit also (backlinks)