88 lines
1.7 KiB
Markdown
88 lines
1.7 KiB
Markdown
# 数据库迁移策略
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> 所属模块：[数据库支持](./概览.md)
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---
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## 1. 本地库迁移
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### SQLite
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```bash
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# 添加迁移
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dotnet ef migrations add InitialCreate --output-dir Migrations/SQLite \
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--context WctMinerDbContext --project src/Gpulse.WCT.DataAnalyzer.Core
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# 应用迁移
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dotnet ef database update
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```
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### PostgreSQL
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```bash
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# 切换配置后添加迁移
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dotnet ef migrations add InitialCreate --output-dir Migrations/PostgreSQL \
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--context WctMinerDbContext --project src/Gpulse.WCT.DataAnalyzer.Core \
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-- --environment Production
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```
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---
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## 2. 发布库迁移
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发布库的迁移需要使用 `ReleaseDbContext`：
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```bash
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# 添加迁移
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dotnet ef migrations add InitialCreate --output-dir Migrations/Release \
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--context ReleaseDbContext --project src/Gpulse.WCT.DataAnalyzer.Core
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# 应用迁移
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dotnet ef database update --context ReleaseDbContext
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```
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---
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## 3. 配置文件示例
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### SQLite（默认双库）
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```json
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{
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"Database": {
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"Type": "sqlite",
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"LocalPath": "./data/database/local.db",
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"ReleasePath": "./data/database/release.db"
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}
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}
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```
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### PostgreSQL（双库独立）
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```json
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{
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"Database": {
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"Type": "postgresql",
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"Host": "localhost",
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"Port": 5432,
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"LocalPath": "Server=localhost;Database=wct_local",
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"ReleasePath": "Server=db-server;Database=wct_charging_parameters"
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}
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}
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```
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---
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## 4. 数据迁移工具
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推荐使用 [pgloader](https://github.com/dimitri/pgloader) 迁移 SQLite 到 PostgreSQL：
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```bash
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# 本地库
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pgloader ./data/database/local.db postgresql://user:password@localhost:5432/wct_local
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# 发布库
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pgloader ./data/database/release.db postgresql://user:password@db-server:5432/wct_charging_parameters
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```
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两个数据库独立迁移，不共享迁移历史。 |