# Adding Properties
**How to add properties in the model:**
1. Once you are in the selected model, click on **+Add Property**
2. Add the **name of the property**
3. Select the **type of the propert**y. A property can be one of the basic types or a created model. (Example: You want only numbers, name or date and time)
**Basic types of properties:**
(i) text - it should only be simple text\
(ii) number - it should be a number\
(iii) email - it should be in an email ID format\
(iv) url - it should be in a URL/website format\
(v) description - when you want to have more text\
(vi) image - if you want it to add an image\
(vii) file - if you want to add a file\
(viii) date - date in dd/mm/yyyy format\
(ix) time - time in x format\
(x) datetime - if you want to have both the date and time\
(xi) any\_one\_of - when the value of the property has to be from a list of items\
(xii) many\_of - when the value of the property is more than one and a part of a list of items\
(xiii) color - select a color\
(xiv) password\
(xv) boolean - true or false
4. Next, you can assign **additional properties** to the main property.
**Additional properties:**
(I) **is\_many:** if multiple values for the same property must be stored\
Example: If you want to add multiple images a product, you must select the “is many” property.
(II) **is\_required:** if a value is compulsory to create a particular model data.\
If this property value is undefined, the data will not be created.\
Example: If you want the name to be mandatory of a product, you must select the “is required” property.
(III) **is\_unique:** a value must be unique across all the data for a particular model.\
Example: If you want the user's email to be unique and not be repeated in your database, you must select the “is unique” property.
(IV) **is\_json\*:** if you want a property to have sub-properties, use “is\_json”.\
How to use is\_json:\
a. When you want to store multiple values of a property in a model, create a new model with those properties\
b. In the type field select the model you have created as type.\
Example: Suppose you want to create an application to list down all the car manufacturers/brands, and you want to store all the cars from different brands. So each car will have its own sub-properties like price, colour, type of car and so on, then you must use is\_json for the car property under the car manufacturer model.
(V) **is\_relation\*:** If data of one model must be linked to another model, a second model must be created, and then the property type of the first model must be set to the second model to create a relation. (Click on the “is\_relation” checkbox)\
Example: if you want to create a social media platform, every post is liked/loved by multiple users, then the type of “liked\_by” property of the post has to be “user” type, where “user” is another model and “is\_relation” has to be set to true (Click on the “is\_relation” checkbox) and “is\_many” has to be checked too.\
\&#xNAN;**\*(if type is one of the selected models, this property is shown)**
5. Click on the “Add” button and it will add the property that you have created.
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