📝 Update ModelRead to ModelPublic documentation and examples (#885)

Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>
This commit is contained in:
Esteban Maya
2024-04-08 18:07:48 -05:00
committed by GitHub
parent fa79856a4b
commit 1eb40b1f33
68 changed files with 427 additions and 427 deletions

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@ -98,7 +98,7 @@ But we also want to have a `HeroCreate` for the data we want to receive when **c
* `secret_name`, required
* `age`, optional
And we want to have a `HeroRead` with the `id` field, but this time annotated with `id: int`, instead of `id: Optional[int]`, to make it clear that it is required in responses **read** from the clients:
And we want to have a `HeroPublic` with the `id` field, but this time annotated with `id: int`, instead of `id: Optional[int]`, to make it clear that it is required in responses **read** from the clients:
* `id`, required
* `name`, required
@ -183,9 +183,9 @@ Here's the important detail, and probably the most important feature of **SQLMod
This means that the class `Hero` represents a **table** in the database. It is both a **Pydantic** model and a **SQLAlchemy** model.
But `HeroCreate` and `HeroRead` don't have `table = True`. They are only **data models**, they are only **Pydantic** models. They won't be used with the database, but only to declare data schemas for the API (or for other uses).
But `HeroCreate` and `HeroPublic` don't have `table = True`. They are only **data models**, they are only **Pydantic** models. They won't be used with the database, but only to declare data schemas for the API (or for other uses).
This also means that `SQLModel.metadata.create_all()` won't create tables in the database for `HeroCreate` and `HeroRead`, because they don't have `table = True`, which is exactly what we want. 🚀
This also means that `SQLModel.metadata.create_all()` won't create tables in the database for `HeroCreate` and `HeroPublic`, because they don't have `table = True`, which is exactly what we want. 🚀
/// tip
@ -355,7 +355,7 @@ Then we just `add` it to the **session**, `commit`, and `refresh` it, and finall
Because it is just refreshed, it has the `id` field set with a new ID taken from the database.
And now that we return it, FastAPI will validate the data with the `response_model`, which is a `HeroRead`:
And now that we return it, FastAPI will validate the data with the `response_model`, which is a `HeroPublic`:
//// tab | Python 3.10+
@ -743,9 +743,9 @@ As an alternative, we could use `HeroBase` directly in the API code instead of `
On top of that, we could easily decide in the future that we want to receive **more data** when creating a new hero apart from the data in `HeroBase` (for example, a password), and now we already have the class to put those extra fields.
### The `HeroRead` **Data Model**
### The `HeroPublic` **Data Model**
Now let's check the `HeroRead` model.
Now let's check the `HeroPublic` model.
This one just declares that the `id` field is required when reading a hero from the API, because a hero read from the API will come from the database, and in the database it will always have an ID.
@ -815,7 +815,7 @@ This one just declares that the `id` field is required when reading a hero from
## Review the Updated Docs UI
The FastAPI code is still the same as above, we still use `Hero`, `HeroCreate`, and `HeroRead`. But now, we define them in a smarter way with inheritance.
The FastAPI code is still the same as above, we still use `Hero`, `HeroCreate`, and `HeroPublic`. But now, we define them in a smarter way with inheritance.
So, we can jump to the docs UI right away and see how they look with the updated data.

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@ -164,7 +164,7 @@ This will let the client know that they probably made a mistake on their side an
Then, if the hero exists, we return it.
And because we are using the `response_model` with `HeroRead`, it will be validated, documented, etc.
And because we are using the `response_model` with `HeroPublic`, it will be validated, documented, etc.
//// tab | Python 3.10+

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@ -40,9 +40,9 @@ Let's update that. 🤓
First, why is it that we are not getting the related data for each hero and for each team?
It's because we declared the `HeroRead` with only the same base fields of the `HeroBase` plus the `id`. But it doesn't include a field `team` for the **relationship attribute**.
It's because we declared the `HeroPublic` with only the same base fields of the `HeroBase` plus the `id`. But it doesn't include a field `team` for the **relationship attribute**.
And the same way, we declared the `TeamRead` with only the same base fields of the `TeamBase` plus the `id`. But it doesn't include a field `heroes` for the **relationship attribute**.
And the same way, we declared the `TeamPublic` with only the same base fields of the `TeamBase` plus the `id`. But it doesn't include a field `heroes` for the **relationship attribute**.
//// tab | Python 3.10+
@ -146,7 +146,7 @@ And the same way, we declared the `TeamRead` with only the same base fields of t
Now, remember that <a href="https://fastapi.tiangolo.com/tutorial/response-model/" class="external-link" target="_blank">FastAPI uses the `response_model` to validate and **filter** the response data</a>?
In this case, we used `response_model=TeamRead` and `response_model=HeroRead`, so FastAPI will use them to filter the response data, even if we return a **table model** that includes **relationship attributes**:
In this case, we used `response_model=TeamPublic` and `response_model=HeroPublic`, so FastAPI will use them to filter the response data, even if we return a **table model** that includes **relationship attributes**:
//// tab | Python 3.10+
@ -300,7 +300,7 @@ Let's add a couple more **data models** that declare that data so we can use the
## Models with Relationships
Let's add the models `HeroReadWithTeam` and `TeamReadWithHeroes`.
Let's add the models `HeroPublicWithTeam` and `TeamPublicWithHeroes`.
We'll add them **after** the other models so that we can easily reference the previous models.
@ -372,11 +372,11 @@ These two models are very **simple in code**, but there's a lot happening here.
### Inheritance and Type Annotations
The `HeroReadWithTeam` **inherits** from `HeroRead`, which means that it will have the **normal fields for reading**, including the required `id` that was declared in `HeroRead`.
The `HeroPublicWithTeam` **inherits** from `HeroPublic`, which means that it will have the **normal fields for reading**, including the required `id` that was declared in `HeroPublic`.
And then it adds the **new field** `team`, which could be `None`, and is declared with the type `TeamRead` with the base fields for reading a team.
And then it adds the **new field** `team`, which could be `None`, and is declared with the type `TeamPublic` with the base fields for reading a team.
Then we do the same for the `TeamReadWithHeroes`, it **inherits** from `TeamRead`, and declares the **new field** `heroes`, which is a list of `HeroRead`.
Then we do the same for the `TeamPublicWithHeroes`, it **inherits** from `TeamPublic`, and declares the **new field** `heroes`, which is a list of `HeroPublic`.
### Data Models Without Relationship Attributes
@ -386,11 +386,11 @@ Instead, here these are only **data models** that will tell FastAPI **which attr
### Reference to Other Models
Also, notice that the field `team` is not declared with this new `TeamReadWithHeroes`, because that would again create that infinite recursion of data. Instead, we declare it with the normal `TeamRead` model.
Also, notice that the field `team` is not declared with this new `TeamPublicWithHeroes`, because that would again create that infinite recursion of data. Instead, we declare it with the normal `TeamPublic` model.
And the same for `TeamReadWithHeroes`, the model used for the new field `heroes` uses `HeroRead` to get only each hero's data.
And the same for `TeamPublicWithHeroes`, the model used for the new field `heroes` uses `HeroPublic` to get only each hero's data.
This also means that, even though we have these two new models, **we still need the previous ones**, `HeroRead` and `TeamRead`, because we need to reference them here (and we are also using them in the rest of the *path operations*).
This also means that, even though we have these two new models, **we still need the previous ones**, `HeroPublic` and `TeamPublic`, because we need to reference them here (and we are also using them in the rest of the *path operations*).
## Update the Path Operations

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@ -14,7 +14,7 @@ It's the same process we did for heroes, with a base model, a **table model**, a
We have a `TeamBase` **data model**, and from it, we inherit with a `Team` **table model**.
Then we also inherit from the `TeamBase` for the `TeamCreate` and `TeamRead` **data models**.
Then we also inherit from the `TeamBase` for the `TeamCreate` and `TeamPublic` **data models**.
And we also create a `TeamUpdate` **data model**.