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Figure 12-18. My people database Now, I open my Terminal window and issue the following command: curl http://127.0.0.1:5984/people/_all_docs This brings back all the documents in the database, as you might expect (Figure 12-19).

In section 3.3.4, you saw that namespaces can be simulated by expanding generic objects. The Type.isNamespace method accepts an object and checks whether it has been registered as a namespace using the Type.registerNamespace method. As a consequence, the isNamespace variable in the following code holds true:

Tap any image once to bring up the image overlay, as shown in Figure 10-7. The image overlay allows you to navigate between images (the left and right arrows), start a slide show (the play arrow), or use your photo in some way (the rectangle with the arrow), as discussed in the next section.

Figure 12-19. Returning all documents This time, I m going to make a POST request to this URI, passing a JSON array of the document IDs I want to bring back (in this case jill, kelly, laura, and maria) as the request message: curl -X POST -d '{"keys":["jill","kelly","laura","maria"]}' http://127.0.0.1:5984/people/_all_docs As you can see in Figure 12-20, this time around only those documents that match the document IDs I supplied are returned in the response.

Figure 10-7. Tap any image to display this control overlay. When you do not use the controls, the overlay fades away after a few seconds. The space at the right, where you would expect one more control, is where the iPhone puts its garbage can. This option is not available on the iPod touch.

var isNamespace = Type.isNamespace(Samples);

Figure 12-20. Returning all documents matching set of supplied document IDs You may have noticed in the previous example that only the _id and _rev fields were returned from the document itself. What if you want to get back the documents In my example, I have given each document a name field with the person s full name. I use the query parameter include_docs=true at the end of the URI in my HTTP request to tell CouchDB to include the documents in the response: curl -X POST -d '{"keys":[" jill","kelly","laura","maria"]}' http://127.0.0.1:5984/people/_all_docs include_docs=true The result is shown in Figure 12-21 notice that each row has a doc field with the actual document inside.

Flip your iPod onto its side to have your photo reorient itself. If the photo was shot using landscape orientation, it fits itself to the wider view.

Let s continue our exploration of the methods for reflecting on client objects by talking about the techniques that you can use to determine an object s type.

What about writing multiple documents into the CouchDB database with a single call to the API Once again, this is very simple you simply make a POST request to the /[databasename]/_bulk_docs URI with the documents you want to write to the database in the request body. This makes it much easier to import data into CouchDB from external data sources. For example, take the contents of Listing 12-1, which I have saved in a file named new_people.json. Listing 12-1. new_people.json { "docs": [ {"_id": "patrick", "name": "Patrick Mac Sweeney"},

As noted, the image overlay (Figure 10-7) offers an option for using your photo in some way. This option, represented by a rectangle with an arrow, is found all the way to the bottom left of your screen. After tapping it, you have two choices: Use your image for wallpaper: The iPod prompts you to move and scale your image, and then set it as wallpaper. Assign your photo to a contact: Your contacts list opens (see 9 for details on maintaining your contacts in the iPod Contacts application). Select a contact name and set the photo, or tap Cancel to return without using the photo.