couchdb

问题 I would like to query for a list of particular documents with one call to CouchDB. With SQL I would do something like SELECT * FROM database.table WHERE database.table.id IN (2,4,56); What is a recipe for doing this in CouchDB by either _id or another field? 回答1: You need to use views keys query parameter to get records with keys in specified set. function(doc){ emit(doc.table.id, null); } And then GET /db/_design/ddoc_name/_view/by_table_id?keys=[2,4,56] To retrieve document content in same

问题 I have searched for this but did not get proper answer if we can connect couchDB directly with angular.js framework or We have to take help of node.js for that. 回答1: While I have no experience of angular.js, looking at the Google Buzz example it appears to have a way to deal with JSON-providing resources. Since this is exactly what CouchDB is, I don't think there is any need for node.js to be involved. All CouchDB functionality can be accessed via HTTP requests, so it should fit right in, if

问题 I have searched for this but did not get proper answer if we can connect couchDB directly with angular.js framework or We have to take help of node.js for that. 回答1: While I have no experience of angular.js, looking at the Google Buzz example it appears to have a way to deal with JSON-providing resources. Since this is exactly what CouchDB is, I don't think there is any need for node.js to be involved. All CouchDB functionality can be accessed via HTTP requests, so it should fit right in, if

问题 I have a single page web app written using AngularJS. It uses PouchDB to replicate to a CouchDB server and works fine. The problem comes when I try to convert the webpage to be available offline by adding cache.manifest. Suddenly ALL the replication tasks throw errors and stop working, whether working offline or online. In Chrome it just says "GET ...myCouchIP/myDB/?_nonce=CxVFIwnEJeGFcyoJ net::ERR_FAILED" In Firefox it also throws an error but mentions that the request is blocked - try

问题 I'm implementing a message application using CouchDB. I want to apply timestamps to each message. I found some references indicating that I should use document update handlers for this. In place updates seem like the right thing. But where would I get a timestamp from? Is it in the req object somewhere? { updates: { "in-place" : function(doc, req) { doc.timestamp = "???"; var message = "set timestamp to "+doc.timestamp; return [doc, message]; } } } 回答1: The answer is to use javascript's date

问题 I am trying to create a html file which synchronize data from a pouchDb to couchDb ..but iam getting the following error in chrome console. Uncaught TypeError: Cannot call method 'addEventListener' of null OPTIONS http://localhost:5984/todos/ 405 (Method Not Allowed) OPTIONS http://localhost:5984/todos/ No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8080' is therefore not allowed access. XMLHttpRequest cannot load http://localhost:5984

问题 How likely is a revision conflict when using an update handler? Should I concern myself with conflict-handling code when writing a robust update function? As described in Document Update Handlers, CouchDB 0.10 and later allows on-demand server-side document modification. Update handlers can process non-JSON formats; but the other major features are these: An HTTP front-end to arbitrarily complex document modification code Similar code needn't be written for all possible clients—a DRY

问题 I have a question that I've been trying to answer for some time now but can't figure out: How do you design, or divide up, CouchDB documents? Take a Blog Post for example. The semi "relational" way to do it would be to create a few objects: Post User Comment Tag Snippet This makes a great deal of sense. But I am trying to use couchdb (for all the reasons that it's great) to model the same thing and it's been extremely difficult. Most of the blog posts out there give you an easy example of how

问题 I have a system that accepts status updates from a variety of unique sources, and each status update creates a new document in the following structure: { "type": "status_update", "source_id": "truck1231", "timestamp": 13023123123, "location": "Boise, ID" } Data purely example, but gets the idea across. Now, these documents are generated at interval, once an hour or so. An hour later, we might the insert: { "type": "status_update", "source_id": "truck1231", "timestamp": 13023126723, "location"

问题 How are multiple range queries implemented in CouchDB? For a single range condition, startkey and endkey combination works fine, but the same thing is not working with a multiple range condition. My View function is like this: "function(doc){ if ((doc['couchrest-type'] == 'Item') && doc['loan_name']&& doc['loan_period']&& doc['loan_amount']) { emit([doc['template_id'], doc['loan_name'],doc['loan_period'], doc['loan_amount']],null);}}" I need to get the whole docs with loan_period > 5 and loan