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Added example with eventual read consistency in Node.js #480

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Merged
jmdobry merged 3 commits into from
Sep 19, 2017
Merged

Added example with eventual read consistency in Node.js #480

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5e5ac9f
Example with eventual read consistency in Node.js
irri Sep 13, 2017
08ccb24
Merge branch 'master' into master
irri Sep 15, 2017
64b2858
Couple updates.
jmdobry Sep 19, 2017
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18 changes: 17 additions & 1 deletion datastore/concepts.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1033,9 +1033,25 @@ class Query extends TestHelper {

testEventualConsistentQuery (t) {
t.plan(0);
const datastoreMock = datastore;
datastore = this.datastore;
// [START eventual_consistent_query]
// Read consistency cannot be specified in google-cloud-node.
const ancestorKey = datastore.key(['TaskList', 'default']);
const query = datastore.createQuery('Task')
.hasAncestor(ancestorKey);

query.run({ consistency: 'eventual' });
// [END eventual_consistent_query]
return query.run({ consistency: 'eventual' })
.then((results) => {
datastore = datastoreMock;
const entities = results[0];
return entities;
})
.catch((err) => {
datastore = datastoreMock;
return Promise.reject(err);
});
}
}

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