Nurguly Ashyrov

GraphQL for ProcessWire

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16 hours ago, mvdesign said:

@Nurguly Ashyrov Hi, is there a way to add images/files to a page with the updatePage method ? If not, do you plan to implement it or do I have to do this another way ?

Unfortunately not yet. I am planning to implement them. But I am a bit busy now and it would definitely take some time to implement it. For now, you will have to do it some other way. Sorry :( 

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When I go to GraphiQl interface, selector argument for template fields does not appear to be optional as it's in the screencast. However, if I provide a selector, it works as expected. Do I need to set up something on backend?

How it looks on my GraphiQL:

mine.png.cc4f36341789f0adda896e40f4986af4.png

How it is in the screencast

screencast.png.9569ef1df452db72361faac3b40dbbe9.png

 

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13 hours ago, abdus said:

When I go to GraphiQl interface, selector argument for template fields does not appear to be optional as it's in the screencast. However, if I provide a selector, it works as expected. Do I need to set up something on backend?

Hi @abdus. You are good to go actually. The argument is required only when there is an exclamation mark after it. It does not have to be = false. Sorry for the confusion, the way I explain it in screencast is a bit misleading. To sum it up, if there is an exclamation mark "!" at the end, it means it is required, of not then it is optional. The = false part means, the default value is false. I know, it sounds stupid. It was a bug in the library I used for this module. I updated it to the latest version since the screencast and now it shows correctly. The = false part is actually is a bug in older version of the module. You probably installed the latest version which shows correctly.

So, your version is actually is the way it supposed to be. The version in the screencast is a bit misleading, but still correct.

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3 hours ago, Nurguly Ashyrov said:

Hi @abdus. You are good to go actually. The argument is required only when there is an exclamation mark after it. It does not have to be = false. Sorry for the confusion, the way I explain it in screencast is a bit misleading. To sum it up, if there is an exclamation mark "!" at the end, it means it is required, of not then it is optional. The = false part means, the default value is false. I know, it sounds stupid. It was a bug in the library I used for this module. I updated it to the latest version since the screencast and now it shows correctly. The = false part is actually is a bug in older version of the module. You probably installed the latest version which shows correctly.

So, your version is actually is the way it supposed to be. The version in the screencast is a bit misleading, but still correct.

Thanks for the clarification. The problem is that if I dont specify any selector, I get empty array, also an error

chrome_2017-04-06_15-50-19.thumb.png.00e9aa75f76ebead5470e0a37f80b24b.png

But if I specify a selector, it all works fine

chrome_2017-04-06_15-53-01.thumb.png.cbbe96957338cba8f6b242264d8e3940.png

I'm not sure if this is the expected behavior.

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20 hours ago, abdus said:

Thanks for the clarification. The problem is that if I dont specify any selector, I get empty array, also an error

I'm not sure if this is the expected behavior.

Well now I am embarrassed. :( So sorry. It turns out upgrading to the latest graphql library broke some stuff. For some reason I did not check the queries without the selectors. I made some fixes. This should solve your problem. Please get the latest version and try again.

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12 hours ago, Nurguly Ashyrov said:

This should solve your problem

Thanks a lot for the changes, it works without a problem now :)

Also, is it possible for you to add some hookable functions to the module so that we can add custom queries and mutations? Inside Schema::build(), query and mutation fields are defined, maybe split build() method into ___getMutations and ___getQueries, then we can modify $event->returns inside hooks to add our own fields? Something like this maybe:

<?php
// maybe build parameters in 
// /ProcessGraphQL/ProcessGraphQL.module

public function ___getQueries() {
  // build an assc. array of FieldInterface objects
  return [...];
}

public function ___getMutations() {
  // build an assc. array of FieldInterface objects
  return [...];
}

public function executeGraphQL()
{
  // instantiating Processor and setting the schema

  $schema = new Schema($this->___getQueries(), $this->___getMutations());
  $processor = new Processor($schema);

  // ...
}

then inside Schema.php you would just use the provided fields.

<?php
class Schema extends AbstractSchema {
    private $queries = [];
    private $mutations = [];

    public function __construct($queries, $mutations)
    {
        // populate fields, perform checks etc
    }

    public function build(SchemaConfig $config)
    {
        $moduleConfig = Utils::moduleconfig();
        $query = $config->getQuery();
        $mutation = $config->getMutation();

        // add other query fields
        $query->addFields($this->queries);
        $mutation->addFields($this->mutations);
    }
}

It's a proof of concept, needs better separation of concerns etc, but it should work, why wouldn't it.

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Or maybe use $moduleConfig instead of causing fragmentation.

<?php // Schema.php
public function build(SchemaConfig $config)
{
	// $moduleConfig is an instance of ProcessGraphQL module
	$moduleConfig = Utils::moduleconfig();
	$customQueries = $moduleConfig->___getQueries();
	$customMutations = $moduleConfig->___getMutations();

	$query = $config->getQuery();
	$mutation = $config->getMutation();

	$query->addFields($customQueries);
	$mutation->addFields($customQueries);
	// then populate your own fields etc.
}
  

 

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On 4/8/2017 at 4:58 AM, abdus said:

Also, is it possible for you to add some hookable functions to the module so that we can add custom queries and mutations?...

Done! :)

The latest version now allows you to hook into getQuery & getMutation methods of the ProcessGraphQL class. Those hooks are solely there so you could modify the query and mutation operations. Here how it might look like in your template file.

<?php namespace ProcessWire;
use Youshido\GraphQL\Type\Scalar\StringType;

$processGraphQL = $modules->get('ProcessGraphQL');

wire()->addHookAfter('ProcessGraphQL::getQuery', function ($event) {
    $query = $event->return;
  
    $query->addField('hello', [
        'type' => new StringType(),
        'resolve' => function () {
            return 'world!';
        }
    ]);
});

echo $processGraphQL->executeGraphQL();

The above code will add a hello field into your GraphQL query that responds with the string "world!". You'll have to use the Youshido\GraphQL library that ProcessGraphQL module uses internally. The same thing could be done with the mutation operation via getMutation  hook method.

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@Nurguly Ashyrov I am trying to build a mutation field for mailing list subscription that takes in email address and returns status code and error messages, if any. 

<?php namespace ProcessWire;
// /site/templates/graphql.php

use ProcessWire\Api\SubscriptionField;
require_once '../modules/ProcessGraphQL/vendor/autoload.php';

$processGraphQL = modules()->get('ProcessGraphQL');

wire()->addHookAfter('ProcessGraphQL::getMutation', function ($event) {
    $query = $event->return;
    $query->addField(new SubscriptionField());
});

echo $processGraphQL->executeGraphQL();

Here's my SubscriptionField definition

Spoiler

<?php namespace Processwire\Api;
// /site/templates/api/SubscriptionField.php

use Youshido\GraphQL\Config\Field\FieldConfig;
// others

class SubscriptionField extends AbstractField
{
    public function getType()
    {
        return new SubscriptionType();
    }

    public function resolve($value, array $args, ResolveInfo $info)
    {
        return [
            'statusCode' => 200,
            'errors' => [
                'no error'
            ]
        ];
    }

    public function build(FieldConfig $config)
    {
        $config->addArgument('email', new NonNullType(new StringType()));
    }
}

and my SubscriptionType class

Spoiler

<?php namespace ProcessWire\Api;
// /site/templates/api/SubscriptionType.php
use Youshido\GraphQL\Type\ListType\ListType;
// others

class SubscriptionType extends AbstractObjectType
{

    public function getName()
    {
        return 'Subscription';
    }

    public function build($config)
    {
        $config->addField('statusCode', [
            'type' => new NonNullType(new IntType()),
            'description' => 'The subscription status code. E.g. 200 if successful.',
            'resolve' => function ($value) {
                return (integer)$value->statusCode;
            }
        ]);

        $config->addField('errors', [
            'type' => new ListType(new StringType()),
            'description' => 'Human readable subscription errors. E.g. "Added to list!"',
            'resolve' => function ($value) {
                return (string)$value->errors;
            }
        ]);
    }

}

When I open the GraphiQL console, I get this error

chrome_2017-04-09_17-44-58.png.e7445fbe2fd0a032a0fcf2d9444d5ce0.png

I am not sure why PHP can't find the class, any ideas?

When I manually require field class (require_once 'api/SubscriptionField.php';), it resolves the class, but then cannot resolve others (error: Class 'Youshido\GraphQL\Field\AbstractField' not found)

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@abdus First of all you don't need to import ProcesGraphQL's vendor.php file. It is done automatically when you do 

$processGraphQL = modules()->get('ProcessGraphQL');

Second is, I don't see where you include your /site/templates/api/SubscriptionField.php file into graphql.php. So replace the 

require_once '../modules/ProcessGraphQL/vendor/autoload.php';

with

require_once "./api/SubscriptionType.php";

in your graphql.php and it should work.

Also, your SubscriptionField class requires the public function getName().

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1 minute ago, Nurguly Ashyrov said:

@abdus First of all you don't need to import ProcesGraphQL's vendor.php file. It is done automatically when you do 


$processGraphQL = modules()->get('ProcessGraphQL');

Second is, I don't see where you include your /site/templates/api/SubscriptionField.php file into graphql.php. So replace the 


require_once '../modules/ProcessGraphQL/vendor/autoload.php';

with


require_once "./api/SubscriptionType.php";

in your graphql.php and it should work.

Also, your SubscriptionField class requires the public function getName().

Thanks for the guidance @Nurguly Ashyrov. The problem was that I wasn't including calling the module (and therefore not autoloading GraphQL classes) before I included mine. That was why it wasn't resolving.

<?php
// CORRECT
$processGraphQL = modules()->get('ProcessGraphQL');
require_once 'api/SubscriptionField.php';
require_once 'api/SubscriptionType.php';

// INCORRECT
require_once 'api/SubscriptionField.php';
require_once 'api/SubscriptionType.php';
$processGraphQL = modules()->get('ProcessGraphQL');

 

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For reference here's a simple mutation field implementation

<?php
wire()->addHookAfter('ProcessGraphQL::getMutation', function ($event) {
    $query = $event->return;
    $query->addField('log', [
      	// define return object under type
        'type' => new ObjectType([
            'name' => 'Log',
            'fields' => [
                'result' => [
                    'type' => new StringType()
                ]
            ]
        ]),
      	// available arguments for the query
        'args' => [
            'text' => new StringType()
        ],
      	// what to do with the request
        'resolve' => function ($value, $args) {
            // process given input
          	// return object outline should be same as 'type'
            return [
                'result' => 'done. ' . $args['text']
            ];
        }
    ]);
});

When you refresh GraphiQL console, you get your new field!

graphql.thumb.png.b670200b517c7563e5330a441fa3c9de.png

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Hi,

I just tried the module and get a JSON.parse Error because the query responded  this error:.

EDIT: Running on PHP 7.1 on Heroku and ext-mbstring was missing. I installed it and the error is away :-)


Fatal error: Uncaught Error: Call to undefined function Youshido\GraphQL\Parser\mb_strlen() in /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Token.php:63
Stack trace:
#0 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Tokenizer.php(184): Youshido\GraphQL\Parser\Token->__construct('identifier', 2, 7, 'pages')
#1 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Tokenizer.php(134): Youshido\GraphQL\Parser\Tokenizer->scanWord()
#2 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Tokenizer.php(33): Youshido\GraphQL\Parser\Tokenizer->scan()
#3 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Tokenizer.php(320): Youshido\GraphQL\Parser\Tokenizer->next()
#4 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Parser.php(96): Youshido\GraphQL\Parser\Tokenizer->lex()
#5 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Parser.php(42): Youshido\GraphQL\Parser\Parser->parseBody()
#6 /app/site/modules/Pro in /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Token.php on line 63


Error:     Uncaught Error: Call to undefined function Youshido\GraphQL\Parser\mb_strlen() in /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Token.php:63
Stack trace:
#0 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Tokenizer.php(184): Youshido\GraphQL\Parser\Token->__construct('identifier', 2, 7, 'pages')
#1 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Tokenizer.php(134): Youshido\GraphQL\Parser\Tokenizer->scanWord()
#2 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Tokenizer.php(33): Youshido\GraphQL\Parser\Tokenizer->scan()
#3 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Tokenizer.php(320): Youshido\GraphQL\Parser\Tokenizer->next()
#4 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Parser.php(96): Youshido\GraphQL\Parser\Tokenizer->lex()
#5 /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Parser.php(42): Youshido\GraphQL\Parser\Parser->parseBody()
#6 /app/site/modules/Pro (line 63 of /app/site/modules/ProcessGraphQL/vendor/youshido/graphql/src/Parser/Token.php) 

This error message was shown because: site is in debug mode. ($config->debug = true; => /site/config.php). Error has been logged. 

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hi @Nurguly Ashyrov, I am planning to use this module to share content from one site to another. I got it up and running on my staging server but I would like to restrict access to the API data. How would you set up authentication to consume GraphQL data remotely?

Thx
Rudy

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On 9/28/2017 at 2:32 AM, Rudy said:

How would you set up authentication to consume GraphQL data remotely?

Hey, Rudy! I couldn't fully understand your use case. I guess you want to restrict access to certain entities, like your other site. It is very easy to restrict access to certain ip address. Just before serving GraphQL API you could check for the requested entities ip address and behave accordingly. For example:

<?php
if ($_SERVER['REMOTE_ADDR'] == 123.234.34.1 ) {
  echo $modules->get('ProcessGraphQL')->executeGraphQL();
} else {
  echo 'Access Denied';
}

I can't say for sure if that's what you are asking though. If not, please give more details on what you are trying to achieve.

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@Nurguly Ashyrov,

Your solution is actually quite simple and should work in my current case. A proper authentication (oAuth or JWT or even a simple token exchange) would be ideal.

My current use case: I have a master PW website with all the content. I also have 5 other websites that draw content from the master site. Essentially I want to treat the master site as an API server, serving data via GraphQL.

Thx
Rudy 

 

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2 hours ago, thomasaull said:

I Just played around with it a little. Looks awesome so far! It would be great if PageTable was supported, or is it already possible with a workaround?

PageTable is not supported yet. To be honest I am very busy right now and don't have much time to update this module. So I can't say when additional features will be added. Until then, you'll have to figure out your own way. Sorry :) 

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Hi @Nurguly Ashyrov, this looks like a great module - thank you for developing it!

I'm a complete noob to the world of GraphQL, and have been trying for two days to get this module running in combination with Ember.js. If I could get it to work, it sure would be a glorious combination. But so far it has been pretty frustrating :o

One thing that I keep running into, is that your implementation always returns an array of pages, using the 'list' field* inside the query.
However, this makes it impossible to request a single page. Even when using something like limit=1 in the selector. 

For instance, I could imagine this to work fine

{
  basic_page(s: "name:contact") {
    first {
      id
      name
    }
  }
}

Which then could return 

{
    "data": {
        "basic_page": {
            "first": {
                "id": "1017",
                "name": "contact"
            }
        }
    }
}

Basically, any of PW's regular PageArray methods to find something would be a welcome addition ( ie. ->eq(n), ->get(selector), ->first(), ->last(), etc.)

Is this something I can achieve with the getQuery hook? Or in another way?
Thanks in advance for any pointers or help. 

(* I have to say, this use of the field keyword is very confusing for a long time PW user). 

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      logActivity ($logmessage) - you may log success if you want

      logError ($logmessage) - you may log warnings, too. - Errors are logged automaticaly
       
       
      useSentLog (true | false) - intended for usage with e.g. third party newsletter modules - tells the send() method to make usage of the sentLog-methods - the following three sentLog methods are hookable, e.g. if you don't want log into files you may provide your own storage, or add additional functionality here

      sentLogReset ()  - starts a new LogSession - Best usage would be interactively once when setting up a new Newsletter

      sentLogGet ()  - is called automaticly within the send() method - returns an array containing all previously used emailaddresses

      sentLogAdd ($emailaddress)  - is called automaticly within the send() method
       
      Changelog: https://github.com/horst-n/WireMailSmtp/blob/master/CHANGELOG.md
       
    • By ukyo
      Call ProcessWire API Functions Inside STRING
      Github Repo
      Current status : BETA
      Each called method must return string value !
      I added all functions, but not tested all. I focused page(), page()->render and field properties (label, description and notes). I also tested some basic pages() api calls.
      Your API calls must start with { and must end with }. For use multiple arguments inside functions, separate arguments with ~ char.
      NOTE If you pass directly arguments to api {page(title)}, this call will check for requestedApiCall()->get(arguments).
      USAGE
      processString(string, page, language); Get page title <?php $str = "You are here : {page:title}"; echo processString($str); ?> Get page children render result <?php $str = "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.<hr>{page:render:children}"; echo processString($str); ?> Get homepage title <?php $str = "You can visit our <a hre='{pages(1):url}'>{pages:get(1):title}</a>"; echo processString($str); ?> Get title field label, description or notes <?php $str = "Our title field properties are : label: {label(title)} - description: {description(title)} - notes: {notes(title)}"; echo processString($str); ?> Multiple examples <?php $str = " <ul class='uk-list uk-list-striped'> <li><b>01: GET FIELD LABEL</b> <code>&#123;label(title)&#125;</code> <b>RESULT :</b> <code>{label(title)}</code></li> <li><b>02: GET FIELD LABEL WITH PREFIX</b> <code>&#123;label(title~=> )&#125;</code> <b>RESULT :</b> <code>{label(title~=> )}</code></li> <li><b>03: GET FIELD LABEL WITH SUFFIX</b> <code>&#123;label(title~~ <=)&#125;</code> <b>RESULT :</b> <code>{label(title~~ <=)}</code></li> <li><b>04: GET FIELD DESCRIPTION</b> <code>&#123;description(title)&#125;</code> <b>RESULT :</b> <code>{description(title)}</code><br> <li><b>05: GET FIELD DESCRIPTION WITH PREFIX</b> <code>&#123;description(title~=> )&#125;</code> <b>RESULT :</b> <code>{description(title~=> )}</code></li> <li><b>06: GET FIELD DESCRIPTION WITH SUFFIX</b> <code>&#123;description(title~~ <=)&#125;</code> <b>RESULT :</b> <code>{description(title~~ <=)}</code></li> <li><b>07: GET FIELD NOTES</b> <code>&#123;notes(title)&#125;</code> <b>RESULT :</b> <code>{notes(title)}</code><br> <li><b>08: GET FIELD NOTES WITH PREFIX</b> <code>&#123;notes(title~=> )&#125;</code> <b>RESULT :</b> <code>{notes(title~=> )}</code></li> <li><b>09: GET FIELD NOTES WITH SUFFIX</b> <code>&#123;notes(title~~ <=)&#125;</code> <b>RESULT :</b> <code>{notes(title~~ <=)}</code></li> <li><b>10: GET PAGE TITLE</b> <code>&#123;page(title)&#125;</code> <b>RESULT :</b> <code>{page(title)}</code></li> <li><b>11: GET PAGE TITLE</b> <code>&#123;page:title&#125;</code> <b>RESULT :</b> <code>{page:title}</code></li> <li><b>12: GET PAGE RENDER TITLE</b> <code>&#123;page:render:title&#125;</code> <b>RESULT :</b> <code>{page:render:title}</code></li> <li><b>12: GET HOMEPAGE TITLE</b> <code>&#123;pages:get(template=home):title&#125;</code> <b>RESULT :</b> <code>{pages:get(template=home):title}</code></li> <li><b>13: GET HOMEPAGE TEMPLATE ID</b> <code>&#123;pages:get(template=home):template:id&#125;</code> <b>RESULT :</b> <code>{pages:get(template=home):template:id}</code></li> </ul> "; echo processString($str); ?>
    • By Robin S
      This module corrects a few things that I find awkward about the "Add New Template" workflow in the PW admin. I opened a wishlist topic a while back because it would good to resolve some of these things in the core, but this module is a stopgap for now.
      Originally I was going to share these as a few standalone hooks, but decided to bundle them together in a configurable module instead. This module should be considered alpha until it has gone through some more testing.
      Add Template Enhancements
      Adds some efficiency enhancements when adding or cloning templates via admin.

      Features
      Derive template label from name: if you like to give each of your templates a label then this feature can save some time. When one or more new templates are added in admin a label is derived automatically from the name. There are options for underscore/hyphen replacement and capitalisation of the label. Edit template after add: when adding only a single template, the template is automatically opened for editing after it is added. Copy field contexts when cloning: this copies the field contexts (a.k.a. overrides such as column width, label and description) from the source template to the new template when using the "Duplicate/clone this template?" feature on the Advanced tab. Copy field contexts when duplicating fields: this copies the field contexts if you select the "Duplicate fields used by another template" option when adding a new template. Usage
      Install the Add Template Enhancements module.
      Configure the module settings according to what suits you.
       
      https://github.com/Toutouwai/AddTemplateEnhancements
    • By AAD Web Team
      Hi,
      I've put in a support request (as a followup on an existing one) for this but it's nearly 10pm Ryan's time, so I thought I'd ask on here just in case someone can help...
      Yesterday we purchased ProDrafts, but I couldn't get the key to validate. Every time I hit submit on the module settings screen the key would be removed from the field I entered it in, and then it would complain about the missing value. I put in a support request and Ryan responded last night. It turned out it was because we're behind a proxy/firewall. He gave me a fix to get around that issue - some code to go into admin.php. I put that code in and saved admin.php, but now I can't even get into our admin anymore!
      (Just to clarify, I took the code back out and saved admin.php but that made no difference. It's definitely not the new code causing the error.)
      The errors relate to a lack of permission on the ProDrafts module (see attached screenshot). We do have a key, but evidently the code Ryan gave me to add the key in via admin.php isn't taking effect before the error is thrown...?
      I tried removing the ProDrafts directory from the modules directory, but that hasn't helped.
      Is there a hook I can put in somewhere to tell it not to load ProDrafts at all, or not check the permissions? Or is there some way to manually uninstall it from the file system?
      Thanks!
      Margaret