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(DOCSP-39838) [CPP Driver] Write Data to MongoDB > Replace a Document (#62) (#65)
* (DOCSP-49838) New pages for replace_one * (DOCSP-39838) Build error. * (DOCSP-39838) Edited write landing page to include replace page. * (DOCSP-39838) Reordered options and results tables. * (DOCSP-39838) Hint example. * (DOCSP-39838) Build error fix. * (DOCSP-39838) Adding separate section level for examples. * (DOCSP-39838) Levels. * (DOCSP-39838) Edits. * (DOCSP-39838) Example edit. * (DOCSP-39838) Edits. * (DOCSP-39838) Updated the Write Data landing page to have replace code example. * (DOCSP-39838) Updated the Write Data landing page code sample * (DOCSP-39838) Updated the Write Data landing page code sample (added comment) * (DOCSP-39838) Changes. * (DOCSP-39838) Edit landing page code example. * (DOCSP-39838) Include _id field mention in first paragraph. * (DOCSP-39838) Edits. * (DOCP-39838) Update links in table. * (DOCSP-39838) edits. * (DOCSP-39838) Added important admonition. * (DOCSP-39838) Edits * (DOCSP-39838) Edits * (DOCSP-39838) Edit table header. * (DOCSP-39838) Added comments to example. * (DOCSP-39838) Indentation error. * (DOCSP-39838) Table edits. * (DOCSP-39838) Separated output from example. * (DOCSP-39838) Example wording. * (DOCSP-39838) Render error * (DOCSP-39838) Example rendering fixes. * (DOCSP-39838) Misc edits. * (DOCSP-39838) Misc edits. * (DOCSP-39838) Misc edits. * (DOCSP-39838) Misc edits. * (DOCSP-39838) Indent error * (DOCSP-39838) Indent error * (DOCSP-39838) Adding quotation marks to field values. * (DOCSP-39838) @norareidy removed inline find_one() link. * (DOCSP-39838) @norareidy Replace update with replace. * (DOCSP-39838) @norareidy removed monospace from headers for style guide. * (DOCSP-39838) @norareidy Swapping field and function. * (DOCSP-39838) @norareidy Condensing example introduction. * (DOCSP-39838) @norareidy Condensing example introduction. * (DOCSP-39838) @norareidy Condensing and wording edits for example introductions. * (DOCSP-39838) @norareidy Adding warning that sample ID may differ. * (DOCSP-39838) @norareidy Bolded first instance of replace operation and replaced link for hint field. * (DOCSP-39838) @norareidy Header underline fix. * (DOCSP-39838) Adding context to links. * (DOCSP-39838) @norareidy review edits. * (DOCSP-39838) @norareidy Final review changes. * (DOCSP-39838) @kevinAlbs comment fixes. ---------
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‎source/includes/usage-examples/write-code-examples.cpp

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// end-update-multiple
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}
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{
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// Replaces a document that matches the specified criteria
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// start-replace-one
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auto query_filter = make_document(kvp("<field to match>", "<value to match>"));
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auto replace_doc = make_document(make_document(kvp("<field name>", "<value>")));
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auto result = collection.replace_one(query_filter.view(), replace_doc.view());
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// end-replace-one
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}
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{
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// Deletes a document that matches the specified criteria
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// start-delete-one

‎source/includes/write/replace.cpp

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#include <iostream>
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#include <bsoncxx/builder/basic/document.hpp>
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#include <bsoncxx/json.hpp>
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#include <mongocxx/client.hpp>
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#include <mongocxx/instance.hpp>
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#include <mongocxx/uri.hpp>
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using bsoncxx::builder::basic::kvp;
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using bsoncxx::builder::basic::make_document;
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int main() {
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mongocxx::instance instance;
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mongocxx::uri uri("<connection string>");
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mongocxx::client client(uri);
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// start-db-coll
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auto db = client["sample_restaurants"];
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auto collection = db["restaurants"];
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// end-db-coll
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{
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// replaces a document that has a "name" value of "Nobu"
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// with a document that has a "name" of "La Bernadin"
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// start-replace-one
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auto query_filter = make_document(kvp("name", "Nobu"));
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auto replace_doc = make_document(kvp("name", "La Bernadin"));
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auto result = collection.replace_one(query_filter.view(), replace_doc.view());
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// end-replace-one
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}
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{
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// Retrieves a document to verify the replacement operation
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// start-replace-one-io
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auto new_doc = collection.find_one(make_document(kvp("name", "La Bernadin")));
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std::cout << "New document: " << bsoncxx::to_json(*new_doc) << std::endl;
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// end-replace-one-io
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}
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{
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// Replaces a document that has a "name" value of "Nobu" and instructs the operation to use the "name" field index
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// start-replace-options-hint
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auto index_specification = make_document(kvp("name", 1));
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collection.create_index(index_specification.view());
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mongocxx::options::replace opts{};
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opts.hint(mongocxx::hint{"name_1"});
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auto query_filter = make_document(kvp("name", "Nobu"));
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auto replace_doc = make_document(kvp("name", "La Bernadin"));
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auto result = collection.replace_one(query_filter.view(), replace_doc.view(), opts);
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// end-replace-options-hint
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}
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{
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// Replaces a document that has a "name" value of "In-N-Out Burger"
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// and instructs the operation to insert a new operation if none match.
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// start-replace-options-upsert
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std::cout << "Total document count before replace_one(): " << collection.count_documents({}) << std::endl;
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mongocxx::options::replace opts{};
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opts.upsert(true);
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auto query_filter = make_document(kvp("name", "In-N-Out Burger"));
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auto replace_doc = make_document(kvp("name", "Shake Shack"));
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auto result = collection.replace_one(query_filter.view(), replace_doc.view(), opts);
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std::cout << "Total document count after replace_one(): " << collection.count_documents({}) << std::endl;
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// end-replace-options-upsert
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}
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{
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// Replaces the matching document and prints the number of matched documents
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// start-replace-result-matched
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auto query_filter = make_document(kvp("name", "Shake Shack"));
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auto replace_doc = make_document(kvp("name", "In-N-Out Burger"));
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auto result = collection.replace_one(query_filter.view(), replace_doc.view());
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std::cout << "Matched documents: " << result->matched_count() << std::endl;
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// end-replace-result-matched
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}
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{
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// Replaces a document that has a "name" value of "In-N-Out Burger" and instructs the operation
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// to insert a new document if none match.
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// start-replace-result-upsert
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mongocxx::options::replace opts{};
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opts.upsert(true);
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auto query_filter = make_document(kvp("name", "In-N-Out Burger"));
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auto replace_doc = make_document(kvp("name", "Shake Shack"));
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auto result = collection.replace_one(query_filter.view(), replace_doc.view(), opts);
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auto id = result->upserted_id()->get_value();
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std::cout << "Upserted ID: " << id.get_oid().value.to_string() << std::endl;
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// end-replace-result-upsert
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}
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}

‎source/write.txt

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/write/insert
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/write/update
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/write/replace
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/write/delete
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/write/bulk-write
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/write/gridfs
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To learn more about the ``update_many()`` method, see the
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:ref:`Update Documents <cpp-write-update>` guide.
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.. TODO:
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Replace One
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-----------
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Replace One
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-----------
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The following code shows how to replace a single document in a collection:
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.. literalinclude:: /includes/usage-examples/write-code-examples.cpp
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:start-after: start-replace-one
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:end-before: end-replace-one
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:language: cpp
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:dedent:
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To learn more about the ``replace_one()`` method, see the
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:ref:`Replace Documents <cpp-write-replace>` guide.
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Delete One
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----------

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