Interface: GenericDatabaseWriter<DataModel>

server.GenericDatabaseWriter

An interface to read from and write to the database within Convex mutation functions.

Convex guarantees that all writes within a single mutation are executed atomically, so you never have to worry about partial writes leaving your data in an inconsistent state. See the Convex Guide for the guarantees Convex provides your functions.

If you're using code generation, use the DatabaseReader type in convex/_generated/server.d.ts which is typed for your data model.

Type parameters

Name	Type
DataModel	extends GenericDataModel

Hierarchy

• GenericDatabaseReader<DataModel>

  ↳ GenericDatabaseWriter

Properties

system

• system: BaseDatabaseReader<SystemDataModel>

An interface to read from the system tables within Convex query functions

The two entry points are:

• get, which fetches a single document by its GenericId.
• query, which starts building a query.

Inherited from

GenericDatabaseReader.system

Defined in

server/database.ts:82

Methods

get

▸ get<TableName>(id): Promise<null | DocumentByName<DataModel, TableName>>

Fetch a single document from the database by its GenericId.

Type parameters

Name	Type
TableName	extends string

Parameters

Name	Type	Description
id	GenericId<TableName>	The GenericId of the document to fetch from the database.

Returns

Promise<null | DocumentByName<DataModel, TableName>>

• The GenericDocument of the document at the given GenericId, or null if it no longer exists.

Inherited from

GenericDatabaseReader.get

Defined in

server/database.ts:22

---

query

▸ query<TableName>(tableName): QueryInitializer<NamedTableInfo<DataModel, TableName>>

Begin a query for the given table name.

Queries don't execute immediately, so calling this method and extending its query are free until the results are actually used.

Type parameters

Name	Type
TableName	extends string

Parameters

Name	Type	Description
tableName	TableName	The name of the table to query.

Returns

QueryInitializer<NamedTableInfo<DataModel, TableName>>

• A QueryInitializer object to start building a query.

Inherited from

GenericDatabaseReader.query

Defined in

server/database.ts:35

---

normalizeId

▸ normalizeId<TableName>(tableName, id): null | GenericId<TableName>

Returns the string ID format for the ID in a given table, or null if the ID is from a different table or is not a valid ID.

This accepts the string ID format as well as the .toString() representation of the legacy class-based ID format.

This does not guarantee that the ID exists (i.e. db.get(id) may return null).

Type parameters

Name	Type
TableName	extends string

Parameters

Name	Type	Description
tableName	TableName	The name of the table.
id	string	The ID string.

Returns

null | GenericId<TableName>

Inherited from

GenericDatabaseReader.normalizeId

Defined in

server/database.ts:51

---

insert

▸ insert<TableName>(table, value): Promise<GenericId<TableName>>

Insert a new document into a table.

Type parameters

Name	Type
TableName	extends string

Parameters

Name	Type	Description
table	TableName	The name of the table to insert a new document into.
value	WithoutSystemFields<DocumentByName<DataModel, TableName>>	The Value to insert into the given table.

Returns

Promise<GenericId<TableName>>

• GenericId of the new document.

Defined in

server/database.ts:108

---

patch

▸ patch<TableName>(id, value): Promise<void>

Patch an existing document, shallow merging it with the given partial document.

New fields are added. Existing fields are overwritten. Fields set to undefined are removed.

Type parameters

Name	Type
TableName	extends string

Parameters

Name	Type	Description
id	GenericId<TableName>	The GenericId of the document to patch.
value	Partial<DocumentByName<DataModel, TableName>>	The partial GenericDocument to merge into the specified document. If this new value specifies system fields like _id, they must match the document's existing field values.

Returns

Promise<void>

Defined in

server/database.ts:124

---

replace

▸ replace<TableName>(id, value): Promise<void>

Replace the value of an existing document, overwriting its old value.

Type parameters

Name	Type
TableName	extends string

Parameters

Name	Type	Description
id	GenericId<TableName>	The GenericId of the document to replace.
value	WithOptionalSystemFields<DocumentByName<DataModel, TableName>>	The new GenericDocument for the document. This value can omit the system fields, and the database will fill them in.

Returns

Promise<void>

Defined in

server/database.ts:136

---

delete

▸ delete(id): Promise<void>

Delete an existing document.

Parameters

Name	Type	Description
id	GenericId<TableNamesInDataModel<DataModel>>	The GenericId of the document to remove.

Returns

Promise<void>

Defined in

server/database.ts:146