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52 lines
1.9 KiB
Markdown
52 lines
1.9 KiB
Markdown
# Models
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The `models` root folder contains all the model files, i.e. files containing all
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the models. **Models** here, refers to the classes that handle the data, its
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validation and updation and a bunch of other stuff.
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Each model directly or indirectly extends the `Doc` class from
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`fyo/model/doc.ts` so for more info check that file and the associated types
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in `fyo/model/types.ts`.
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A model class can used even if the class body has no content, for example
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`PurchaseInvoiceItem`. Else the model used will default to using `Doc`. The
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class can also be used to provide type information for the field types else they
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default to the catch all `DocValue` example:
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```typescript
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class Todo extends Doc {
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title?: string;
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date?: Date;
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completed?: boolean;
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}
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```
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While this has obvious advantages, the drawback is if the underlying fieldtype
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changes this too will have to be changed.
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The data stored by the models is decided by the schema passed to it's
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constructor. Check `schemas/README.md` for info on this.
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## Adding Stuff
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When adding stuff to `models/**` make sure that it isn't importing any Vue code
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or other frontend specific code globally. This is cause model file tests will
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directly use the the `Fyo` class and will be run using `mocha` on `node`.
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Importing frontend code will break all the tests. This also implies that one
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should be wary about transitive dependencies.
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It should also not import the `Fyo` object (singleton) from `src`, where ever
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`fyo` is required in models it should be passed to it.
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_Note: Frontend specific code can be imported but they should be done so, only
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using dynamic imports i.e. `await import('...')`._
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## Regional Models
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Regional models should as far as possible extend the base model and override
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what's required.
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They should then be imported dynamicall and returned from `getRegionalModels` in
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`models/index.ts` on the basis of `countryCode`.
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