new feature: dynamic links 💥

frappe/core/doctype/custom_field/custom_field.js

@@ -47,9 +47,18 @@ cur_frm.fields_dict['dt'].get_query = function(doc, dt, dn) {
 }
 
 cur_frm.cscript.fieldtype = function(doc, dt, dn) {
-	if(doc.fieldtype == 'Link') cur_frm.fields_dict['options_help'].disp_area.innerHTML = 'Please enter name of the document you want this field to be linked to in <b>Options</b>.<br> Eg.: Customer';
-	else if(doc.fieldtype == 'Select') cur_frm.fields_dict['options_help'].disp_area.innerHTML = 'Please enter values in <b>Options</b>, with each option on a new line. <br>Eg.: <b>Field:</b> Country <br><b>Options:</b><br>China<br>India<br>United States<br><br><b>';
-	else cur_frm.fields_dict['options_help'].disp_area.innerHTML = '';
+	if(doc.fieldtype == 'Link') {
+		cur_frm.fields_dict['options_help'].disp_area.innerHTML =
+		  __('Name of the Document Type (DocType) you want this field to be linked to. e.g. Customer');
+	} else if(doc.fieldtype == 'Select') {
+		cur_frm.fields_dict['options_help'].disp_area.innerHTML =
+			__('Options for select. Each option on a new line. e.g.: <br>Option 1<br>Option 2<br>Option 3<br>');
+	} else if(doc.fieldtype == 'Dynamic Link') {
+		cur_frm.fields_dict['options_help'].disp_area.innerHTML =
+			__('Fieldname which will be the DocType for this link field.');
+	} else {
+		cur_frm.fields_dict['options_help'].disp_area.innerHTML = '';
+	}
 }
 
 

frappe/core/doctype/custom_field/custom_field.json

@@ -57,7 +57,7 @@
    "no_copy": 0, 
    "oldfieldname": "fieldtype", 
    "oldfieldtype": "Select", 
-   "options": "Button\nCheck\nCode\nColumn Break\nCurrency\nData\nDate\nDatetime\nFloat\nHTML\nImage\nInt\nLink\nLong Text\nPassword\nPercent\nRead Only\nSection Break\nSelect\nSmall Text\nTable\nText\nText Editor\nTime", 
+   "options": "Button\nCheck\nCode\nColumn Break\nCurrency\nData\nDate\nDatetime\nDynamic Link\nFloat\nHTML\nImage\nInt\nLink\nLong Text\nPassword\nPercent\nRead Only\nSection Break\nSelect\nSmall Text\nTable\nText\nText Editor\nTime", 
    "permlevel": 0, 
    "reqd": 1, 
    "search_index": 0
@@ -257,7 +257,7 @@
  ], 
  "icon": "icon-glass", 
  "idx": 1, 
- "modified": "2014-05-26 03:21:02.832530", 
+ "modified": "2014-06-20 05:54:17.225853", 
  "modified_by": "Administrator", 
  "module": "Core", 
  "name": "Custom Field", 

frappe/core/doctype/docfield/docfield.json

@@ -34,7 +34,7 @@
    "label": "Type", 
    "oldfieldname": "fieldtype", 
    "oldfieldtype": "Select", 
-   "options": "Attach\nButton\nCheck\nCode\nColumn Break\nCurrency\nData\nDate\nDatetime\nFloat\nHTML\nImage\nInt\nLink\nLong Text\nPassword\nPercent\nRead Only\nSection Break\nSelect\nSmall Text\nTable\nText\nText Editor\nTime", 
+   "options": "Attach\nButton\nCheck\nCode\nColumn Break\nCurrency\nData\nDate\nDatetime\nDynamic Link\nFloat\nHTML\nImage\nInt\nLink\nLong Text\nPassword\nPercent\nRead Only\nSection Break\nSelect\nSmall Text\nTable\nText\nText Editor\nTime", 
    "permlevel": 0, 
    "reqd": 1, 
    "search_index": 1
@@ -304,7 +304,7 @@
  "in_dialog": 1, 
  "issingle": 0, 
  "istable": 1, 
- "modified": "2014-05-26 03:00:13.705058", 
+ "modified": "2014-06-20 05:42:29.975498", 
  "modified_by": "Administrator", 
  "module": "Core", 
  "name": "DocField", 

frappe/core/doctype/doctype/doctype.py

@@ -161,6 +161,7 @@ class DocType(Document):
 def validate_fields_for_doctype(doctype):
 	validate_fields(frappe.get_meta(doctype).get("fields"))
 
+# this is separate because it is also called via custom field
 def validate_fields(fields):
 	def check_illegal_characters(fieldname):
 		for c in ['.', ',', ' ', '-', '&', '%', '=', '"', "'", '*', '$',
@@ -204,6 +205,13 @@ def validate_fields(fields):
 		if d.in_list_view and d.fieldtype!="Image" and (d.fieldtype in no_value_fields):
 			frappe.throw(_("'In List View' not allowed for type {0} in row {1}").format(d.fieldtype, d.idx))
 
+	def check_dynamic_link_options(d):
+		if d.fieldtype=="Dynamic Link":
+			doctype_pointer = filter(lambda df: df.fieldname==d.options, fields)
+			if not doctype_pointer or (doctype_pointer[0].fieldtype!="Link") \
+				or (doctype_pointer[0].options!="DocType"):
+				frappe.throw(_("Options 'Dynamic Link' type of field must point to another Link Field with options as 'DocType'"))
+
 	for d in fields:
 		if not d.permlevel: d.permlevel = 0
 		if not d.fieldname:
@@ -212,6 +220,7 @@ def validate_fields(fields):
 		check_unique_fieldname(d.fieldname)
 		check_illegal_mandatory(d)
 		check_link_table_options(d)
+		check_dynamic_link_options(d)
 		check_hidden_and_mandatory(d)
 		check_in_list_view(d)
 

frappe/core/doctype/event/event.json

@@ -218,24 +218,26 @@
   }, 
   {
    "fieldname": "ref_type", 
-   "fieldtype": "Data", 
+   "fieldtype": "Link", 
    "hidden": 0, 
    "label": "Ref Type", 
    "no_copy": 0, 
    "oldfieldname": "ref_type", 
    "oldfieldtype": "Data", 
+   "options": "DocType", 
    "permlevel": 0, 
-   "read_only": 1, 
+   "read_only": 0, 
    "search_index": 0
   }, 
   {
    "fieldname": "ref_name", 
-   "fieldtype": "Data", 
+   "fieldtype": "Dynamic Link", 
    "hidden": 0, 
    "label": "Ref Name", 
    "no_copy": 0, 
    "oldfieldname": "ref_name", 
    "oldfieldtype": "Data", 
+   "options": "ref_type", 
    "permlevel": 0, 
    "read_only": 1, 
    "search_index": 0
@@ -244,7 +246,7 @@
  "icon": "icon-calendar", 
  "idx": 1, 
  "in_create": 1, 
- "modified": "2014-05-27 03:49:10.612463", 
+ "modified": "2014-06-20 06:40:05.415405", 
  "modified_by": "Administrator", 
  "module": "Core", 
  "name": "Event", 

frappe/core/doctype/todo/todo.json

@@ -91,13 +91,14 @@
   {
    "allow_on_submit": 0, 
    "fieldname": "reference_type", 
-   "fieldtype": "Data", 
+   "fieldtype": "Link", 
    "hidden": 0, 
    "in_filter": 0, 
    "label": "Reference Type", 
    "no_copy": 0, 
    "oldfieldname": "reference_type", 
    "oldfieldtype": "Data", 
+   "options": "DocType", 
    "permlevel": 0, 
    "print_hide": 0, 
    "report_hide": 0, 
@@ -107,13 +108,14 @@
   {
    "allow_on_submit": 0, 
    "fieldname": "reference_name", 
-   "fieldtype": "Data", 
+   "fieldtype": "Dynamic Link", 
    "hidden": 0, 
    "in_filter": 0, 
    "label": "Reference Name", 
    "no_copy": 0, 
    "oldfieldname": "reference_name", 
    "oldfieldtype": "Data", 
+   "options": "reference_type", 
    "permlevel": 0, 
    "print_hide": 0, 
    "report_hide": 0, 
@@ -158,7 +160,7 @@
  "in_dialog": 0, 
  "issingle": 0, 
  "max_attachments": 0, 
- "modified": "2014-05-27 03:49:21.667888", 
+ "modified": "2014-06-20 06:20:11.947183", 
  "modified_by": "Administrator", 
  "module": "Core", 
  "name": "ToDo", 

frappe/model/base_document.py

@@ -264,11 +264,17 @@ class BaseDocument(object):
 				return "{}: {}".format(_(df.label), docname)
 
 		invalid_links = []
-		for df in self.meta.get_link_fields():
-			doctype = df.options
+		for df in self.meta.get_link_fields() + self.meta.get("fields",
+			{"fieldtype":"Dynamic Link"}):
 
-			if not doctype:
-				frappe.throw(_("Options not set for link field {0}").format(df.fieldname))
+			if df.fieldtype=="Link":
+				doctype = df.options
+				if not doctype:
+					frappe.throw(_("Options not set for link field {0}").format(df.fieldname))
+			else:
+				doctype = self.get(df.options)
+				if not doctype:
+					frappe.throw(_("{0} must be set first").format(self.meta.get_label(df.options)))
 
 			docname = self.get(df.fieldname)
 			if docname:

frappe/model/db_schema.py

@@ -29,6 +29,7 @@ type_map = {
 	,'Text':		('text', '')
 	,'Data':		('varchar', '255')
 	,'Link':		('varchar', '255')
+	,'Dynamic Link':('varchar', '255')
 	,'Password':	('varchar', '255')
 	,'Select':		('varchar', '255')
 	,'Read Only':	('varchar', '255')

frappe/model/delete_doc.py

@@ -8,6 +8,7 @@ import frappe.model.meta
 import frappe.defaults
 from frappe.utils.file_manager import remove_all
 from frappe import _
+from rename_doc import dynamic_link_queries
 
 def delete_doc(doctype=None, name=None, force=0, ignore_doctypes=None, for_reload=False, ignore_permissions=False):
 	"""
@@ -48,6 +49,7 @@ def delete_doc(doctype=None, name=None, force=0, ignore_doctypes=None, for_reloa
 			# check if links exist
 			if not force:
 				check_if_doc_is_linked(doc)
+				check_if_doc_is_dynamically_linked(doc)
 
 		delete_from_table(doctype, name, ignore_doctypes, doc)
 
@@ -106,3 +108,21 @@ def check_if_doc_is_linked(doc, method="Delete"):
 				frappe.throw(_("Cannot delete or cancel because {0} {1} is linked with {2} {3}").format(doc.doctype,
 					doc.name, item.parent or item.name, item.parenttype if item.parent else link_dt),
 					frappe.LinkExistsError)
+
+def check_if_doc_is_dynamically_linked(doc):
+	for query in dynamic_link_queries:
+		for df in frappe.db.sql(query, as_dict=True):
+			if frappe.get_meta(df.parent).issingle:
+
+				# dynamic link in single doc
+				refdoc = frappe.get_singles_dict(df.parent)
+				if refdoc.get(df.options)==doc.doctype and refdoc.get(df.fieldname)==doc.name:
+					frappe.throw(_("Cannot delete or cancel because {0} {1} is linked with {2} {3}").format(doc.doctype,
+						doc.name, df.parent, df.parent), frappe.LinkExistsError)
+			else:
+
+				# dynamic link in table
+				for name in frappe.db.sql_list("""select name from `tab{parent}` where
+					{options}=%s and {fieldname}=%s""".format(**df), (doc.doctype, doc.name)):
+					frappe.throw(_("Cannot delete or cancel because {0} {1} is linked with {2} {3}").format(doc.doctype,
+						doc.name, df.parent, name), frappe.LinkExistsError)

frappe/model/document.py

@@ -494,7 +494,7 @@ class Document(BaseDocument):
 			val1 = cint(val1)
 			val2 = cint(val2)
 		elif df.fieldtype in ("Data", "Text", "Small Text", "Long Text",
-			"Text Editor", "Select", "Link"):
+			"Text Editor", "Select", "Link", "Dynamic Link"):
 				val1 = cstr(val1)
 				val2 = cstr(val2)
 

frappe/model/rename_doc.py

@@ -33,6 +33,8 @@ def rename_doc(doctype, old, new, force=False, merge=False, ignore_permissions=F
 	link_fields = get_link_fields(doctype)
 	update_link_field_values(link_fields, old, new, doctype)
 
+	rename_dynamic_links(doctype, old, new)
+
 	if doctype=='DocType':
 		rename_doctype(doctype, old, new, force)
 
@@ -274,3 +276,27 @@ def update_parenttype_values(old, new):
 			update `tab%s` set parenttype=%s
 			where parenttype=%s""" % (doctype, '%s', '%s'),
 		(new, old))
+
+dynamic_link_queries =  [
+	"""select parent, fieldname, options from tabDocField where fieldtype='Dynamic Link'""",
+	"""select dt as parent, fieldname, options from `tabCustom Field` where fieldtype='Dynamic Link'""",
+]
+
+def rename_dynamic_links(doctype, old, new):
+	for query in dynamic_link_queries:
+		for df in frappe.db.sql(query, as_dict=True):
+
+			# dynamic link in single, just one value to check
+			if frappe.get_meta(df.parent).issingle:
+				refdoc = frappe.get_singles_dict(df.parent)
+				if refdoc.get(df.options)==doctype and refdoc.get(df.fieldname)==old:
+
+					frappe.db.sql("""update tabSingles set value=%s where
+						field=%s and value=%s""", (new, df.fieldname, old))
+			else:
+				# replace for each value where renamed
+				for to_change in frappe.db.sql_list("""select name from `tab{parent}` where
+					{options}=%s and {fieldname}=%s""".format(**df), (doctype, old)):
+
+					frappe.db.sql("""update `tab{parent}` set {fieldname}=%s
+						where name=%s""".format(**df), (new, to_change))

frappe/public/js/frappe/form/control.js

@@ -1,7 +1,7 @@
 // Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
 // MIT License. See license.txt
 
-frappe.ui.form.make_control = function(opts) {
+frappe.ui.form.make_control = function (opts) {
 	var control_class_name = "Control" + opts.df.fieldtype.replace(/ /g, "");
 	if(frappe.ui.form[control_class_name]) {
 		return new frappe.ui.form[control_class_name](opts);
@@ -802,32 +802,36 @@ frappe.ui.form.ControlLink = frappe.ui.form.ControlData.extend({
 		this.setup_buttons();
 		this.setup_autocomplete();
 	},
+	get_options: function() {
+		return this.df.options;
+	},
 	setup_buttons: function() {
 		var me = this;
 
 		// magnifier - search
 		this.$input_area.find(".btn-search").on("click", function() {
+			var doctype = me.get_options();
+			if(!doctype) return;
 			new frappe.ui.form.LinkSelector({
-				doctype: me.df.options,
+				doctype: doctype,
 				target: me,
 				txt: me.get_value()
 			});
 		});
 
 		// open
-		if(frappe.model.can_read(me.df.options)) {
-			this.$input_area.find(".btn-open").on("click", function() {
-				var value = me.get_value();
-				if(value && me.df.options) frappe.set_route("Form", me.df.options, value);
-			});
-		} else {
-			this.$input_area.find(".btn-open").remove();
-		}
+		this.$input_area.find(".btn-open").on("click", function() {
+			var value = me.get_value();
+			if(value && me.get_options())
+				frappe.set_route("Form", me.get_options(), value);
+		});
 
 		// new
-		if(frappe.model.can_create(me.df.options)) {
+		if(this.df.fieldtype==="Dynamic Link" || frappe.model.can_create(me.df.options)) {
 			this.$input_area.find(".btn-new").on("click", function() {
-				me.frm.new_doc(me.df.options, me);
+				var doctype = me.get_options();
+				if(!doctype) return;
+				me.frm.new_doc(doctype, me);
 			});
 		} else {
 			this.$input_area.find(".btn-new").remove();
@@ -854,18 +858,20 @@ frappe.ui.form.ControlLink = frappe.ui.form.ControlData.extend({
 		this.$input.autocomplete({
 			minLength: 0,
 			source: function(request, response) {
-				if (!me.$input.cache[me.df.options]) {
-					me.$input.cache[me.df.options] = {};
+				var doctype = me.get_options();
+				if(!doctype) return;
+				if (!me.$input.cache[doctype]) {
+					me.$input.cache[doctype] = {};
 				}
 
-				if (me.$input.cache[me.df.options][request.term]!=null) {
+				if (me.$input.cache[doctype][request.term]!=null) {
 					// immediately show from cache
-					response(me.$input.cache[me.df.options][request.term]);
+					response(me.$input.cache[doctype][request.term]);
 				}
 
 				var args = {
 					'txt': request.term,
-					'doctype': me.df.options,
+					'doctype': doctype,
 				};
 
 				me.set_custom_query(args);
@@ -876,13 +882,13 @@ frappe.ui.form.ControlLink = frappe.ui.form.ControlData.extend({
 					no_spinner: true,
 					args: args,
 					callback: function(r) {
-						if(frappe.model.can_create(me.df.options)) {
+						if(frappe.model.can_create(doctype)) {
 							r.results.push({
 								value: "<i class='icon-plus'></i> <em>" + __("Create a new {0}", [me.df.options]) + "</em>",
 								make_new: true
 							});
 						};
-						me.$input.cache[me.df.options][request.term] = r.results;
+						me.$input.cache[doctype][request.term] = r.results;
 						response(r.results);
 					},
 				});
@@ -901,10 +907,13 @@ frappe.ui.form.ControlLink = frappe.ui.form.ControlData.extend({
 			select: function(event, ui) {
 				me.autocomplete_open = false;
 				if(ui.item.make_new) {
+					var doctype = me.get_options();
+					if(!doctype) return;
+
 					if (me.frm) {
-						me.frm.new_doc(me.df.options, me);
+						me.frm.new_doc(doctype, me);
 					} else {
-						new_doc(me.df.options);
+						new_doc(doctype);
 					}
 					return false;
 				}
@@ -968,10 +977,21 @@ frappe.ui.form.ControlLink = frappe.ui.form.ControlData.extend({
 			return;
 		}
 
-		this.frm.script_manager.validate_link_and_fetch(this.df, this.docname, value, callback);
+		this.frm.script_manager.validate_link_and_fetch(this.df, this.get_options(),
+			this.docname, value, callback);
 	},
 });
 
+frappe.ui.form.ControlDynamicLink = frappe.ui.form.ControlLink.extend({
+	get_options: function() {
+		var options = frappe.model.get_value(this.df.parent, this.docname, this.df.options);
+		if(!options) {
+			msgprint(__("Please set {0} first",
+				[frappe.meta.get_docfield(this.df.parent, this.df.options, this.docname).label]));
+		}
+		return options;
+	},
+});
 
 frappe.ui.form.ControlCode = frappe.ui.form.ControlText.extend({
 	make_input: function() {

frappe/public/js/frappe/form/formatters.js

@@ -33,6 +33,7 @@ frappe.form.formatters = {
 		return value ? "<i class='icon-check'></i>" : "<i class='icon-check-empty'></i>";
 	},
 	Link: function(value, docfield, options) {
+		var doctype = docfield._options || docfield.options;
 		if(options && options.for_print)
 			return value;
 		if(!value)
@@ -40,13 +41,13 @@ frappe.form.formatters = {
 		if(docfield && docfield.link_onclick) {
 			return repl('<a onclick="%(onclick)s">%(value)s</a>',
 				{onclick: docfield.link_onclick.replace(/"/g, '&quot;'), value:value});
-		} else if(docfield && docfield.options) {
+		} else if(docfield && doctype) {
 			return repl('%(icon)s<a href="#Form/%(doctype)s/%(name)s">%(label)s</a>', {
-				doctype: encodeURIComponent(docfield.options),
+				doctype: encodeURIComponent(doctype),
 				name: encodeURIComponent(value),
 				label: value,
 				icon: (options && options.no_icon) ? "" :
-					('<i class="icon-fixed-width '+frappe.boot.doctype_icons[docfield.options]+'"></i> ')
+					('<i class="icon-fixed-width '+frappe.boot.doctype_icons[doctype]+'"></i> ')
 			});
 		} else {
 			return value;
@@ -119,11 +120,20 @@ frappe.form.formatters = {
 }
 
 frappe.form.get_formatter = function(fieldtype) {
-	if(!fieldtype) fieldtype = "Data";
+	if(!fieldtype)
+		fieldtype = "Data";
 	return frappe.form.formatters[fieldtype.replace(/ /g, "")] || frappe.form.formatters.Data;
 }
 
 frappe.format = function(value, df, options, doc) {
 	if(!df) df = {"fieldtype":"Data"};
-	return frappe.form.get_formatter(df.fieldtype)(value, df, options, doc);
+	var fieldtype = df.fieldtype || "Data";
+
+	// format Dynamic Link as a Link
+	if(fieldtype==="Dynamic Link") {
+		fieldtype = "Link";
+		df._options = doc ? doc[df.options] : null;
+	}
+
+	return frappe.form.get_formatter(fieldtype)(value, df, options, doc);
 }

frappe/public/js/frappe/form/script_manager.js

@@ -80,7 +80,7 @@ frappe.ui.form.ScriptManager = Class.extend({
 		console.log("----- end of error message -----");
 		console.group && console.groupEnd();
 	},
-	validate_link_and_fetch: function(df, docname, value, callback) {
+	validate_link_and_fetch: function(df, doctype, docname, value, callback) {
 		var me = this;
 
 		if(value) {
@@ -94,7 +94,7 @@ frappe.ui.form.ScriptManager = Class.extend({
 				type: "GET",
 				args: {
 					'value': value,
-					'options': df.options,
+					'options': doctype,
 					'fetch': fetch
 				},
 				no_spinner: true,

frappe/public/js/frappe/ui/filters.js

@@ -255,7 +255,7 @@ frappe.ui.Filter = Class.extend({
 		if(df.fieldtype=='Check') {
 			df.fieldtype='Select';
 			df.options='No\nYes';
-		} else if(['Text','Small Text','Text Editor','Code','Tag','Comments'].indexOf(df.fieldtype)!=-1) {
+		} else if(['Text','Small Text','Text Editor','Code','Tag','Comments','Dynamic Link'].indexOf(df.fieldtype)!=-1) {
 			df.fieldtype = 'Data';
 		} else if(df.fieldtype=='Link' && this.$w.find('.condition').val()!="=") {
 			df.fieldtype = 'Data';

frappe/public/js/frappe/views/doclistview.js

@@ -87,9 +87,11 @@ frappe.views.DocListView = frappe.ui.Listing.extend({
 		this.make_help();
 		this.$page.find(".show_filters").css({"padding":"15px", "margin":"0px -15px"});
 		var me = this;
-		// this.$w.on("render-complete", function() {
-		// 	me.set_sidebar_height();
-		// });
+		this.$w.on("render-complete", function() {
+			if(me.data.length===1) {
+				frappe.set_route("Form", me.doctype, me.data[0].name);
+			}
+		});
 	},
 
 	set_sidebar_height: function() {