英文:
Cannot find Struct property that exists using Go/SQLX
问题
我正在从文件上传中收集元数据，并将其插入到数据库表中。结构如下：
// 文件元数据结构
type MetaData struct {
Owner string
FileRows int64
FileSize string
FileName string
FileUuid string
LastUpdated string
}
以下是我如何填充对结构的引用：
metaDataRow := MetaData{
Owner: "Fake Name",
FileRows: (int64)(count - 1),
FileSize: fileSize,
FileName: fileName,
FileUuid: handle,
LastUpdated: time.Now().Format(time.RFC822Z),
}
我的问题是，当我尝试将这个结构引用插入到数据库时，我收到一个错误消息：
在 &processor.MetaData{Owner:"Fake Name", FileRows:1499, FileSize:"308.9 kB", FileName:"small-file.csv", FileUuid:"1234567890qwerty", LastUpdated:"30 Jan 20 21:13 +0000"} 中找不到名称 Owner。
现在，正如我们可以清楚地看到的，Owner 在结构中是存在的，并且它有一个值，其他字段也是如此。我不确定查询赋值是否在第一次查找时失败并导致了 panic，但我无法继续执行以查看其他字段是否也失败。这是我的 sqlx NamedExec，可能存在结构引用或绑定的问题：
// 执行事务
_, err = tx.NamedExec(INSERT INTO file_metadata ( owner, file_rows, file_size, file_name, file_uuid, last_updated ) VALUES ( :Owner, :FileRows, :FileSize, :FileName, :FileUuid, :LastUpdated ), &metaDataRow)
我希望这是一个容易修复的问题，可能是拼写错误。
英文:
I am gathering metadata from a file upload, and inserting into a DB table. The struct is as such:
// file Metadata struct
type MetaData struct {
Owner string
FileRows int64
FileSize string
FileName string
FileUuid string
LastUpdated string
}
And here is how I am populating a reference to the struct:
metaDataRow := MetaData{
Owner: "Fake Name",
FileRows: (int64)(count - 1),
FileSize: fileSize,
FileName: fileName,
FileUuid: handle,
LastUpdated: time.Now().Format(time.RFC822Z),
}
My issue is that when I try to insert this struct ref into my db, I get an error message:
> could not find name Owner in &processor.MetaData{Owner:"Fake Name", FileRows:1499, FileSize:"308.9 kB", FileName:"small-file.csv", FileUuid:"1234567890qwerty", LastUpdated:"30 Jan 20 21:13 +0000"}
Now, as we can clearly see, Owner exists in the struct and it has a value, as do the others. I am not sure if the query assignment failed on the first lookup and panic'd there, but I can't get past this to see if the others fail as well. Here is my sqlx NamedExec as there may be an issue with my Struct reference, or the binding?
// execute transaction
_, err = tx.NamedExec(`
INSERT INTO file_metadata (
owner,
file_rows,
file_size,
file_name,
file_uuid,
last_updated
) VALUES (
:Owner,
:FileRows,
:FileSize,
:FileName,
:FileUuid,
:LastUpdated
)
`, &metaDataRow)
I am hoping this is an easy fix, borderline typo.
答案1
得分: 2
你可以将 db tag 添加到你的结构体中：
Owner string `db:"owner"`
然后在插入时使用：
...VALUES (:owner, ....
英文:
You could add the db tag to your struct:
Owner string `db:"owner"`
and then on the insert:
...VALUES (:owner, ....
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