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Questions tagged [entities]

Entity-relationship model (ER model for short) is an abstract and conceptual representation of data.

In software engineering, an entity-relationship model (ER model for short) is an abstract and conceptual representation of data. Entity-relationship modeling is a database modeling method, used to produce a type of conceptual schema or semantic data model of a system, often a relational database, and its requirements in a top-down fashion. Diagrams created by this process are called entity-relationship diagrams or ER diagrams.

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Doctrine : One to one to one relation?

I'm making entities for a Symfony2 project at work. I'm trying to make a system that controls the access to certain resources in function of an organisation (a company) and of a role. To sum it up, roles are the same for all the companies, but a…
Gabriel Theron
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Entities to many similar objects can I in anyway make them share interface?

I've got a program with connections to 4 databases. In three of these databases the entity objects are very similar. Now my question is quite simple but I can't wrap my head around how to proceed. I have three databases let's call them 1 2 and 3 in…
Helbo
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Foreign-key properties error

I have a collection of rental properties which each have a bunch of images attached to them (as a child object). I am using the EF 4.0 with a sql ce database and I need to be able to remove all properties and images from the database. Here is the…
randomalbumtitle
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Determining if an entity is weak or not

I'm creating a relational database of a store and its stock of products. In the brief, it says "products can be returned under agreed terms e.g. expiry date or manufacturers error", based on this I created a weak entity "Terms" with product_ID as…
Silver
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Symfony doctrine reverse engineering and Apiplatform

Is there a way to create Apiplatform enabled entities directly from database schemas? I successfully create the entities using php bin/console doctrine:mapping:import "App\Entity" annotation --path=src/Entity , but now i have to add manually the…
Leonel Matias Domingos
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This function can only be invoked by LINQ to Entities after Entity Framework update

var messages = (from sms in (from m in rv.tbl_sms_messages where m.idtbl_user == ids.id where m.sms_date >= days.days7 orderby m.sms_date descending select m) …
FLAMER283
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c++ diagram entitys links library

Does anyone knows any good visual diagram library, that can help me implement faster an application like visio (but simpler of course), that the user can create entities drag them and create links between them (more than one link), and give the…
Nuno
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dialogflow agent doesn't have build-in entities such as @sys.unit-length

I am building my first Google dialogflow agent but the most of the build-in entities described here are missing. https://cloud.google.com/dialogflow/docs/reference/system-entities I am looking for @sys.unit-length in particular. Could the problem…
duffy
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MVC Html.DisplayFor mulitple foreign keys use correct one

I have a table called tblSize with these values; ID (PK) SIZE 1 MM 2 INCH 3 FEET Then I have another table tblMember with these values; ID (PK) MEMBER SIZE MIN_SIZE_ID (FK) MAX_SIZE_ID (FK) 1 BOX A 2 …
Kiel
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How can I use session entities programming with Node.js?

I need to create session entities and use them in my project. I'm using Node.js to do it, but I'm having trouble finding some code/example to take. Can you give me some? I found this documentation, but it gives me only the JSON representation. I…
Mattia Puntarello
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There's a way to bring all entities from bitrix24 in one method?

i am a junior developer helping designing an app that uses bitrix24; i can see that the API has many methods to get all the available entities. I would like to know if someone knows an non official API that can bring them all with just one method?
Ivan S. Leon Dager
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How to select linq entities?

Database name 1: BOOK, table name: BookInformation (BookID(PK),BookName)) BookID BookName --------------------- 19 A 25 T 56 F 45 H 77 K 53 M …
K.E
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HTML 4 Entities

Is there a concise way to scan an html script for entities it is unfamiliar with and import them with their html codes? All I'm getting in place of a 'degree celsius' character, for example, is a question mark.
Jonny1998
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xcode swift 4 Core Data relation between entities?

i am trying to make relation entity between 2 entities , unfortunately its not working well since i am still new with swift. for example i have playlist table and songs table i want to make relation between them ? and this is the Fetch Request :…
Kodr.F
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switch case entities in symfony2

how can i use switch case to persist an entity from many entities i use a variable to rely with the entity this code may be help you to understand my question ?? public function addAction($name, Request $request) { switch ($name) { case…
Ziar Adjel
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