我现在一直在用 NextJS 进行一些修改，并试图将应用程序转换为使用getStaticProps和getStaticPaths使用 [id].js 文件为每个页面在他们自己的单独文件夹中的预渲染静态页面（类似于 pages/posts/[id] .js、/pages/articles/[id].js 等）。由于这两个函数保证在服务器上运行，我选择将 fetch db 函数从我的公共 API 直接移动到这些函数。所以在我的[id].js文件中，我有这样的东西：
获取静态属性：
export async function getStaticProps({ params }) {
let snowflake = require('snowflake-sdk')
require('dotenv').config();
let result = {};
let id = params.id;
const connection = snowflake.createConnection( {
account: "account",
username: "username",
password: "password",
warehouse: "warehouse"
});
console.log("Connecting to Snowflake...")
await connection.connect( <- await doesn't seem to make a difference
function(err, conn) {
if (err) {
console.error('Unable to connect: ' + err.message); <- This never outputs
}
else {
console.log('Successfully connected to Snowflake.'); <- Neither does this
}
}
);
await connection.execute({ <- await doesn't seem to make a difference
sqlText: (`select stuff
from my_snowflake_db
where id=:1`),
binds: [id],
complete: function(err, stmt, data) {
if (err) {
console.error('Failed to execute statement due to the following error: ' + err.message);
} else {
result = data
result["id"] = id
}
}
})
return {
props: {
result
}
}
}
获取静态路径：
export async function getStaticPaths() {
let snowflake = require('snowflake-sdk')
require('dotenv').config();
let paths = []
const connection = snowflake.createConnection( {
account: "account",
username: "username",
password: "password",
warehouse: "warehouse"
});
console.log("Connecting to Snowflake...")
await connection.connect( <- await doesn't seem to make a difference
function(err, conn) {
if (err) {
console.error('Unable to connect: ' + err.message); <- This never outputs
}
else {
console.log('Successfully connected to Snowflake.'); <- Neither does this
}
}
);
await connection.execute({ <- await doesn't seem to make a difference
sqlText: (`select id
from my_snowflake_db
where ...
`),
complete: function(err, stmt, rows) {
if (err) {
console.error('Failed to execute statement due to the following error: ' + err.message); <- Never outputs
} else {
console.log("Got Response!") <- Never outputs
for (var row in rows) {
console.log("Found id: " + row.id)
paths.push({
params: {
id: row.id
}
})
}
}
}
})
console.log("Found paths: " + JSON.stringify(paths)) <- This outputs with an empty list
return {
paths,
fallback: true
}
}
当我使用 npm run build 构建应用程序时，我得到的只是Connecting to Snowflake...and Found paths: []，然后显然getStaticProps会中断，因为列表是空的。我不确定为什么无法建立连接，或者为什么我什至没有收到错误或成功输出。我假设 Snowflake 如何异步连接存在一些问题，但我不明白为什么“await”关键字在这种情况下什么都不做。我可以添加或删除“等待”，结果完全相同。