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DOCSP-51815 Move and standardize find usage exs #539
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| // Retrieves documents that match a query filter by using the Go driver | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "log" | ||
| "os" | ||
|
|
||
| "github.com/joho/godotenv" | ||
| "go.mongodb.org/mongo-driver/v2/bson" | ||
| "go.mongodb.org/mongo-driver/v2/mongo" | ||
| "go.mongodb.org/mongo-driver/v2/mongo/options" | ||
| ) | ||
|
|
||
| func main() { | ||
| if err := godotenv.Load(); err != nil { | ||
| log.Println("No .env file found") | ||
| } | ||
|
|
||
| var uri string | ||
| if uri = os.Getenv("MONGODB_URI"); uri == "" { | ||
| log.Fatal("You must set your 'MONGODB_URI' environment variable. See\n\t https://www.mongodb.com/docs/drivers/go/current/connect/mongoclient/#environment-variable") | ||
| } | ||
|
|
||
| client, err := mongo.Connect(options.Client().ApplyURI(uri)) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer func() { | ||
| if err = client.Disconnect(context.TODO()); err != nil { | ||
| panic(err) | ||
| } | ||
| }() | ||
|
|
||
| coll := client.Database("sample_restaurants").Collection("restaurants") | ||
|
|
||
| // Creates a query filter to match documents in which the "cuisine" | ||
| // is "Italian" | ||
| filter := bson.D{{"cuisine", "Italian"}} | ||
|
|
||
| // Retrieves documents that match the query filter | ||
| cursor, err := coll.Find(context.TODO(), filter) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // Unpacks the cursor into a slice | ||
| var results []Restaurant | ||
| if err = cursor.All(context.TODO(), &results); err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // Prints the results of the find operation as structs | ||
| for _, result := range results { | ||
| cursor.Decode(&result) | ||
| output, err := json.MarshalIndent(result, "", " ") | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| fmt.Printf("%s\n", output) | ||
| } | ||
| } | ||
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61 changes: 61 additions & 0 deletions
61
source/includes/usage-examples/code-snippets/findOneBsonD.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| // Retrieves a document that matches a query filter by using the Go driver | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "log" | ||
| "os" | ||
|
|
||
| "github.com/joho/godotenv" | ||
| "go.mongodb.org/mongo-driver/v2/bson" | ||
| "go.mongodb.org/mongo-driver/v2/mongo" | ||
| "go.mongodb.org/mongo-driver/v2/mongo/options" | ||
| ) | ||
|
|
||
| func main() { | ||
| if err := godotenv.Load(); err != nil { | ||
| log.Println("No .env file found") | ||
| } | ||
|
|
||
| var uri string | ||
| if uri = os.Getenv("MONGODB_URI"); uri == "" { | ||
| log.Fatal("You must set your 'MONGODB_URI' environment variable. See\n\t https://www.mongodb.com/docs/drivers/go/current/connect/mongoclient/#environment-variable") | ||
| } | ||
|
|
||
| client, err := mongo.Connect(options.Client().ApplyURI(uri)) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer func() { | ||
| if err = client.Disconnect(context.TODO()); err != nil { | ||
| panic(err) | ||
| } | ||
| }() | ||
|
|
||
| coll := client.Database("sample_restaurants").Collection("restaurants") | ||
|
|
||
| // Creates a query filter to match documents in which the "name" is | ||
| // "Bagels N Buns" | ||
| filter := bson.D{{"name", "Bagels N Buns"}} | ||
|
|
||
| // Retrieves the first matching document | ||
| var result Restaurant | ||
| err = coll.FindOne(context.TODO(), filter).Decode(&result) | ||
|
|
||
| // Prints a message if no documents are matched or if any | ||
| // other errors occur during the operation | ||
| if err != nil { | ||
| if err == mongo.ErrNoDocuments { | ||
| return | ||
| } | ||
| panic(err) | ||
| } | ||
|
|
||
| output, err := json.MarshalIndent(result, "", " ") | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| fmt.Printf("%s\n", output) | ||
| } |
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Is this
Decodeintentional? It seems like it wouldn't do anything since all of the cursor results are already fetched and decoded by callingcursor.Allabove.If it's not intentional, the same line needs to be removed from
find.goalso.There was a problem hiding this comment.
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Deleted!