Use CloudBase document database WeChat MiniProgram SDK to query, create, update, and delete data. Supports complex queries, pagination, aggregation, and geolocation queries.
Installation
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Use CloudBase document database WeChat MiniProgram SDK to query, create, update, and delete data. Supports complex queries, pagination, aggregation, and geolocation queries.
version
2.23.3
alwaysApply
false
Standalone Install Note
If this environment only installed the current skill, start from the CloudBase main entry and use the published cloudbase/references/... paths for sibling skills.
CloudBase main entry: https://cnb.cool/tencent/cloud/cloudbase/cloudbase-skills/-/git/raw/main/skills/cloudbase/SKILL.md
Current skill raw source: https://cnb.cool/tencent/cloud/cloudbase/cloudbase-skills/-/git/raw/main/skills/cloudbase/references/no-sql-wx-mp-sdk/SKILL.md
Keep local references/... paths for files that ship with the current skill directory. When this file points to a sibling skill such as auth-tool or web-development, use the standalone fallback URL shown next to that reference.
CloudBase Document Database WeChat Mini Program SDK
Activation Contract
Use this first when
A WeChat Mini Program must access CloudBase document database through wx.cloud.database().
The request mentions Mini Program collection CRUD, pagination, aggregation, or geolocation queries.
Read before writing code if
The task is Mini Program database work but you still need to separate it from Web SDK, cloud functions, or SQL tasks.
The request depends on built-in user identity, _openid, or Mini Program-side permissions.
Then also read
Mini Program project rules and CloudBase integration -> ../miniprogram-development/SKILL.md (standalone fallback: https://cnb.cool/tencent/cloud/cloudbase/cloudbase-skills/-/git/raw/main/skills/cloudbase/references/miniprogram-development/SKILL.md)
Mini Program auth and identity flow -> ../auth-wechat/SKILL.md (standalone fallback: https://cnb.cool/tencent/cloud/cloudbase/cloudbase-skills/-/git/raw/main/skills/cloudbase/references/auth-wechat/SKILL.md)
Manually writing _openid during create or update operations.
Assuming built-in Mini Program identity means security rules can be ignored.
Mixing collection CRUD and backend-wide admin workflows in the same client path.
Minimal checklist
Confirm the caller is a Mini Program page/component or Mini Program-side logic.
Initialize wx.cloud correctly before database calls.
Verify whether the collection rules rely on auth.openid / _openid.
Read the specific companion reference file for the operation you need.
Overview
This skill covers Mini Program-side document database access through wx.cloud.database().
Use it for:
collection CRUD in Mini Program pages
query composition and pagination
aggregation
geolocation queries
Mini Program CloudBase access comes with built-in identity, but database operations are still constrained by collection permissions and security rules.
Canonical initialization
const db = wx.cloud.database();
const _ = db.command;
To target a specific environment:
const db = wx.cloud.database({
env: "test"
});
Important notes:
Users are authenticated through the Mini Program CloudBase context.
In cloud functions, caller identity is available through wxContext.OPENID.
In client-side collection rules, ownership checks usually use auth.openid / doc._openid.
Quick routing
CRUD -> ./crud-operations.md
Complex queries -> ./complex-queries.md
Pagination -> ./pagination.md
Aggregation -> ./aggregation.md
Geolocation -> ./geolocation.md
Security rules -> ./security-rules.md
Working rules for a coding agent
Keep Mini Program code Mini Program-native
Use wx.cloud.database().
Do not substitute browser SDK initialization patterns.
Respect ownership fields
_openid is system-managed for SDK writes.
Never set or override _openid manually in .add(), .set(), or .update() payloads.
Remember that security rules validate requests
If a rule requires ownership conditions, the query shape must match that rule model.
Permission errors usually mean the rule/query relationship is wrong, not only that the user is logged out.
Route admin-style operations to backend flows
If the task needs privileged global access, use backend tools or functions instead of exposing that path directly in Mini Program client code.
Quick examples
Basic collection access
const todos = db.collection("todos");
const result = await todos.where({ completed: false }).get();
Document reference
const todo = db.collection("todos").doc("todo-id");
const result = await todo.get();
Best practices
Create clear collection naming conventions.
Use typed wrappers or model helpers in app code where possible.
Design rules around real ownership and sharing patterns.
Use pagination instead of large unbounded reads.
Keep admin/operations logic in backend code, not Mini Program direct access.
