Creating a Model
The Data Modeler engine in Reasy helps you define the structure of your data. This article details the process of creating a data model from scratch.
Start by creating a model. To create,
Give a name to the data model, and there you go.
Now, create entities (tables) to store your data. Also, if you have any pre-built entities, you can import them here, based on your needs.
Create Entities
To create an entity,
Right-click the model and select Add Entity.
Give the entity a name.
Alternatively, you can add an entity by clicking ‘+’, next to the model you created. Entities get vadded with default names: entity1, entity2, and so on; so it's a good practice to rename them as you add them.
Moreover, you are facilitated with a few prebuilt entities such as products, orders, students, and more. To import them, right-click and select Prebuilt Entities, then choose the entity(s) you wish to import.
Likewise, create/import the entities required for your app data.
Next, add attributes to the entity created.
Add Attributes
Attributes are the columns in your. Every entity that you create will have a few attributes such as, "CreatedDate", "ModifiedDate", and "UniqueId" with appropriate data types.
To add an attribute,
Right-click the entity and select Add Attribute.
Give it a unique name and select the data type.
If it’s a key attribute, mark it as a key attribute.
If it’s used for computations, mark it as a computation attribute, and provide a default, minimum, and maximum values. And, define the computation formula.
Add validations to the user inputs; that you may require to validate the entries as they come in. To add condition-based validations, turn on the option, and add conditions. You get the expression as you start setting the validation rules. Once done, test these validations using Test to see how those work.
Tip: Alternatively, you can add attributes by clicking ‘+’ next to Attributes in an entity on the canvas.
Note: Do not enter any spaces between the characters when you name an attribute. An attribute can be set either as a “Key Attribute” or as a “Computation Attribute.”
When you add an attribute, the services needed to perform CRUD operations on that attribute will get created by default. However, you can edit them if they aren’t the key attributes. Aside from these, you can add services as and when you need them.
Likewise, add all the attributes that you need in your entity.
Note: Do not add any spaces between the characters when you name a model.
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