在MongoDB中执行简单的验证？
要在MongoDB中进行验证，请使用验证器。以下是在MongoDB中对集合创建验证的查询-
> db.createCollection( "demo437" , {
... validator: { $jsonSchema: {
... bsonType: "object",
... required: [ "FirstName", "LastName"],
... properties: {
... FirstName: {
... bsonType: "string",
... description: "This is required" },
... LastName: {
... bsonType: "string",
... description: "This is required" }
...
... }
... }}})
{ "ok" : 1 }让我们创建一个包含文档的集合-
> db.demo437.insertOne({"FirstName":"John","LastName":1234});
2020-03-22T17:49:55.590+0530 E QUERY [js] WriteError: Document failed validation :
WriteError({
"index" : 0,
"code" : 121,
"errmsg" : "Document failed validation",
"op" : {
"_id" : ObjectId("5e7757ebbbc41e36cc3cae9a"),
"FirstName" : "John",
"LastName" : 1234
}
})
WriteError@src/mongo/shell/bulk_api.js:461:48
Bulk/mergeBatchResults@src/mongo/shell/bulk_api.js:841:49
Bulk/executeBatch@src/mongo/shell/bulk_api.js:906:13
Bulk/this.execute@src/mongo/shell/bulk_api.js:1150:21
DBCollection.prototype.insertOne@src/mongo/shell/crud_api.js:252:9
@(shell):1:1
>
> db.demo437.insertOne({"FirstName":"John","LastName":"Smith"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e7757f7bbc41e36cc3cae9b")
}
> db.demo437.insertOne({"FirstName":9887,"LastName":"Miller"});
2020-03-22T17:50:29.631+0530 E QUERY [js] WriteError: Document failed validation :
WriteError({
"index" : 0,
"code" : 121,
"errmsg" : "Document failed validation",
"op" : {
"_id" : ObjectId("5e77580dbbc41e36cc3cae9c"),
"FirstName" : 9887,
"LastName" : "Miller"
}
})
WriteError@src/mongo/shell/bulk_api.js:461:48
Bulk/mergeBatchResults@src/mongo/shell/bulk_api.js:841:49
Bulk/executeBatch@src/mongo/shell/bulk_api.js:906:13
Bulk/this.execute@src/mongo/shell/bulk_api.js:1150:21
DBCollection.prototype.insertOne@src/mongo/shell/crud_api.js:252:9
@(shell):1:1
>
>
> db.demo437.insertOne({"FirstName":"David","LastName":"Miller"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e775816bbc41e36cc3cae9d")
}在find()方法的帮助下显示集合中的所有文档-
> db.demo437.find();
这将产生以下输出-
{ "_id" : ObjectId("5e7757f7bbc41e36cc3cae9b"), "FirstName" : "John", "LastName" : "Smith" }
{ "_id" : ObjectId("5e775816bbc41e36cc3cae9d"), "FirstName" : "David", "LastName" : "Miller" }