diff --git a/awx/ui/client/src/inventories-hosts/inventories/related/sources/add/sources-add.controller.js b/awx/ui/client/src/inventories-hosts/inventories/related/sources/add/sources-add.controller.js
index 10865e4823..4415dc386d 100644
--- a/awx/ui/client/src/inventories-hosts/inventories/related/sources/add/sources-add.controller.js
+++ b/awx/ui/client/src/inventories-hosts/inventories/related/sources/add/sources-add.controller.js
@@ -9,24 +9,83 @@ export default ['$state', '$stateParams', '$scope', 'SourcesFormDefinition',
     'GetChoices', 'GetBasePath', 'CreateSelect2', 'GetSourceTypeOptions',
     'rbacUiControlService', 'ToJSON', 'SourcesService', 'Empty',
     'Wait', 'Rest', 'Alert', 'ProcessErrors', 'inventorySourcesOptions',
-    '$rootScope', 'i18n',
+    '$rootScope', 'i18n', 'InventorySourceModel', 'InventoryHostsStrings',
     function($state, $stateParams, $scope, SourcesFormDefinition,  ParseTypeChange,
         GenerateForm, inventoryData, GroupsService, GetChoices,
         GetBasePath, CreateSelect2, GetSourceTypeOptions, rbacUiControlService,
         ToJSON, SourcesService, Empty, Wait, Rest, Alert, ProcessErrors,
-        inventorySourcesOptions,$rootScope, i18n) {
+        inventorySourcesOptions,$rootScope, i18n, InventorySource, InventoryHostsStrings) {
 
         let form = SourcesFormDefinition;
-        init();
+        $scope.mode = 'add';
+        // apply form definition's default field values
+        GenerateForm.applyDefaults(form, $scope, true);
+        $scope.canAdd = inventorySourcesOptions.actions.POST;
+        $scope.envParseType = 'yaml';
 
-        function init() {
-            $scope.mode = 'add';
-            // apply form definition's default field values
-            GenerateForm.applyDefaults(form, $scope, true);
-            $scope.canAdd = inventorySourcesOptions.actions.POST;
-            $scope.envParseType = 'yaml';
-            initSources();
-        }
+        GetChoices({
+            scope: $scope,
+            field: 'source_regions',
+            variable: 'rax_regions',
+            choice_name: 'rax_region_choices',
+            options: inventorySourcesOptions
+        });
+
+        GetChoices({
+            scope: $scope,
+            field: 'source_regions',
+            variable: 'ec2_regions',
+            choice_name: 'ec2_region_choices',
+            options: inventorySourcesOptions
+        });
+
+        GetChoices({
+            scope: $scope,
+            field: 'source_regions',
+            variable: 'gce_regions',
+            choice_name: 'gce_region_choices',
+            options: inventorySourcesOptions
+        });
+
+        GetChoices({
+            scope: $scope,
+            field: 'source_regions',
+            variable: 'azure_regions',
+            choice_name: 'azure_rm_region_choices',
+            options: inventorySourcesOptions
+        });
+
+        // Load options for group_by
+        GetChoices({
+            scope: $scope,
+            field: 'group_by',
+            variable: 'ec2_group_by',
+            choice_name: 'ec2_group_by_choices',
+            options: inventorySourcesOptions
+        });
+
+        initRegionSelect();
+
+        GetChoices({
+            scope: $scope,
+            field: 'verbosity',
+            variable: 'verbosity_options',
+            options: inventorySourcesOptions
+        });
+
+        CreateSelect2({
+            element: '#inventory_source_verbosity',
+            multiple: false
+        });
+
+        $scope.verbosity = $scope.verbosity_options[1];
+
+        GetSourceTypeOptions({
+            scope: $scope,
+            variable: 'source_type_options'
+        });
+
+        const inventorySource = new InventorySource();
 
         var getInventoryFiles = function (project) {
             var url;
@@ -39,7 +98,14 @@ export default ['$state', '$stateParams', '$scope', 'SourcesFormDefinition',
                     .then(({data}) => {
                         $scope.inventory_files = data;
                         $scope.inventory_files.push("/ (project root)");
-                        sync_inventory_file_select2();
+                        CreateSelect2({
+                            element:'#inventory-file-select',
+                            addNew: true,
+                            multiple: false,
+                            scope: $scope,
+                            options: 'inventory_files',
+                            model: 'inventory_file'
+                        });
                         Wait('stop');
                     })
                     .catch(() => {
@@ -59,17 +125,6 @@ export default ['$state', '$stateParams', '$scope', 'SourcesFormDefinition',
             }
         });
 
-        function sync_inventory_file_select2() {
-            CreateSelect2({
-                element:'#inventory-file-select',
-                addNew: true,
-                multiple: false,
-                scope: $scope,
-                options: 'inventory_files',
-                model: 'inventory_file'
-            });
-        }
-
         $scope.lookupCredential = function(){
             if($scope.source.value !== "scm" && $scope.source.value !== "custom") {
                 let kind = ($scope.source.value === "ec2") ? "aws" : $scope.source.value;
@@ -151,7 +206,10 @@ export default ['$state', '$stateParams', '$scope', 'SourcesFormDefinition',
         // region / source options callback
 
         $scope.$on('sourceTypeOptionsReady', function() {
-            initSourceSelect();
+            CreateSelect2({
+                element: '#inventory_source_source',
+                multiple: false
+            });
         });
 
         function initRegionSelect(){
@@ -160,10 +218,6 @@ export default ['$state', '$stateParams', '$scope', 'SourcesFormDefinition',
                 multiple: true
             });
 
-            initGroupBySelect();
-        }
-
-        function initGroupBySelect(){
             let add_new = false;
             if( _.get($scope, 'source') === 'ec2' || _.get($scope.source, 'value') === 'ec2') {
                 $scope.group_by_choices = $scope.ec2_group_by;
@@ -209,81 +263,6 @@ export default ['$state', '$stateParams', '$scope', 'SourcesFormDefinition',
             });
         }
 
-        function initSourceSelect(){
-            CreateSelect2({
-                element: '#inventory_source_source',
-                multiple: false
-            });
-        }
-
-        function initVerbositySelect(){
-            CreateSelect2({
-                element: '#inventory_source_verbosity',
-                multiple: false
-            });
-
-            $scope.verbosity = $scope.verbosity_options[1];
-        }
-
-        function initSources(){
-            GetChoices({
-                scope: $scope,
-                field: 'source_regions',
-                variable: 'rax_regions',
-                choice_name: 'rax_region_choices',
-                options: inventorySourcesOptions
-            });
-
-            GetChoices({
-                scope: $scope,
-                field: 'source_regions',
-                variable: 'ec2_regions',
-                choice_name: 'ec2_region_choices',
-                options: inventorySourcesOptions
-            });
-
-            GetChoices({
-                scope: $scope,
-                field: 'source_regions',
-                variable: 'gce_regions',
-                choice_name: 'gce_region_choices',
-                options: inventorySourcesOptions
-            });
-
-            GetChoices({
-                scope: $scope,
-                field: 'source_regions',
-                variable: 'azure_regions',
-                choice_name: 'azure_rm_region_choices',
-                options: inventorySourcesOptions
-            });
-
-            // Load options for group_by
-            GetChoices({
-                scope: $scope,
-                field: 'group_by',
-                variable: 'ec2_group_by',
-                choice_name: 'ec2_group_by_choices',
-                options: inventorySourcesOptions
-            });
-
-            initRegionSelect();
-
-            GetChoices({
-                scope: $scope,
-                field: 'verbosity',
-                variable: 'verbosity_options',
-                options: inventorySourcesOptions
-            });
-
-            initVerbositySelect();
-
-            GetSourceTypeOptions({
-                scope: $scope,
-                variable: 'source_type_options'
-            });
-        }
-
         $scope.formCancel = function() {
             $state.go('^');
         };
@@ -325,9 +304,17 @@ export default ['$state', '$stateParams', '$scope', 'SourcesFormDefinition',
             } else {
                 params.source = null;
             }
-            SourcesService.post(params).then((response) => {
+
+            inventorySource.request('post', {
+                data: params
+            }).then((response) => {
                 let inventory_source_id = response.data.id;
                 $state.go('^.edit', {inventory_source_id: inventory_source_id}, {reload: true});
+            }).catch(({ data, status, config }) => {
+                ProcessErrors($scope, data, status, null, {
+                    hdr: 'Error!',
+                    msg: InventoryHostsStrings.get('error.CALL', { path: `${config.url}`, status })
+                });
             });
         };
     }
diff --git a/awx/ui/client/src/inventories-hosts/inventories/related/sources/edit/sources-edit.controller.js b/awx/ui/client/src/inventories-hosts/inventories/related/sources/edit/sources-edit.controller.js
index 8218c35fbb..104ff2574a 100644
--- a/awx/ui/client/src/inventories-hosts/inventories/related/sources/edit/sources-edit.controller.js
+++ b/awx/ui/client/src/inventories-hosts/inventories/related/sources/edit/sources-edit.controller.js
@@ -7,85 +7,169 @@
 export default ['$state', '$stateParams', '$scope', 'ParseVariableString',
     'rbacUiControlService', 'ToJSON', 'ParseTypeChange', 'GroupsService',
     'GetChoices', 'GetBasePath', 'CreateSelect2', 'GetSourceTypeOptions',
-    'inventorySourceData', 'SourcesService', 'inventoryData', 'inventorySourcesOptions', 'Empty',
-    'Wait', 'Rest', 'Alert', '$rootScope', 'i18n',
+    'SourcesService', 'inventoryData', 'inventorySourcesOptions', 'Empty',
+    'Wait', 'Rest', 'Alert', '$rootScope', 'i18n', 'InventoryHostsStrings',
+    'ProcessErrors', 'inventorySource',
     function($state, $stateParams, $scope, ParseVariableString,
         rbacUiControlService, ToJSON,ParseTypeChange, GroupsService,
         GetChoices, GetBasePath, CreateSelect2, GetSourceTypeOptions,
-        inventorySourceData, SourcesService, inventoryData, inventorySourcesOptions, Empty,
-        Wait, Rest, Alert, $rootScope, i18n) {
+        SourcesService, inventoryData, inventorySourcesOptions, Empty,
+        Wait, Rest, Alert, $rootScope, i18n, InventoryHostsStrings,
+        ProcessErrors, inventorySource) {
 
-        function init() {
-            $scope.projectBasePath = GetBasePath('projects') + '?not__status=never updated';
-            $scope.canAdd = inventorySourcesOptions.actions.POST;
-            // instantiate expected $scope values from inventorySourceData
-            _.assign($scope,
-                {credential: inventorySourceData.credential},
-                {overwrite: inventorySourceData.overwrite},
-                {overwrite_vars: inventorySourceData.overwrite_vars},
-                {update_on_launch: inventorySourceData.update_on_launch},
-                {update_cache_timeout: inventorySourceData.update_cache_timeout},
-                {instance_filters: inventorySourceData.instance_filters},
-                {inventory_script: inventorySourceData.source_script},
-                {verbosity: inventorySourceData.verbosity});
+        const inventorySourceData = inventorySource.get();
 
-            $scope.inventory_source_obj = inventorySourceData;
-            if (inventorySourceData.credential) {
-                $scope.credential_name = inventorySourceData.summary_fields.credential.name;
+        $scope.projectBasePath = GetBasePath('projects') + '?not__status=never updated';
+        $scope.canAdd = inventorySourcesOptions.actions.POST;
+        // instantiate expected $scope values from inventorySourceData
+        _.assign($scope,
+            {credential: inventorySourceData.credential},
+            {overwrite: inventorySourceData.overwrite},
+            {overwrite_vars: inventorySourceData.overwrite_vars},
+            {update_on_launch: inventorySourceData.update_on_launch},
+            {update_cache_timeout: inventorySourceData.update_cache_timeout},
+            {instance_filters: inventorySourceData.instance_filters},
+            {inventory_script: inventorySourceData.source_script},
+            {verbosity: inventorySourceData.verbosity});
+
+        $scope.inventory_source_obj = inventorySourceData;
+        if (inventorySourceData.credential) {
+            $scope.credential_name = inventorySourceData.summary_fields.credential.name;
+        }
+
+        if(inventorySourceData.source === 'scm') {
+            $scope.project = inventorySourceData.source_project;
+            $scope.project_name = inventorySourceData.summary_fields.source_project.name;
+            updateSCMProject();
+        }
+
+        // display custom inventory_script name
+        if (inventorySourceData.source === 'custom' && inventorySourceData.summary_fields.source_script) {
+            $scope.inventory_script_name = inventorySourceData.summary_fields.source_script.name;
+        }
+        $scope = angular.extend($scope, inventorySourceData);
+
+        $scope.$watch('summary_fields.user_capabilities.edit', function(val) {
+            $scope.canAdd = val;
+        });
+
+        $scope.$on('sourceTypeOptionsReady', function() {
+            $scope.source = _.find($scope.source_type_options, { value: inventorySourceData.source });
+            var source = $scope.source && $scope.source.value ? $scope.source.value : null;
+            $scope.cloudCredentialRequired = source !== '' && source !== 'scm' && source !== 'custom' && source !== 'ec2' ? true : false;
+            CreateSelect2({
+                element: '#inventory_source_source',
+                multiple: false
+            });
+
+            if (source === 'ec2' || source === 'custom' ||
+                source === 'vmware' || source === 'openstack' ||
+                source === 'scm' || source === 'cloudforms'  ||
+                source === 'satellite6') {
+
+                var varName;
+                if (source === 'scm') {
+                    varName = 'custom_variables';
+                } else {
+                    varName = source + '_variables';
+                }
+
+                $scope[varName] = ParseVariableString(inventorySourceData
+                    .source_vars);
+
+                ParseTypeChange({
+                    scope: $scope,
+                    field_id: varName,
+                    variable: varName,
+                    parse_variable: 'envParseType',
+                });
             }
+        });
 
-            if(inventorySourceData.source === 'scm') {
-                $scope.project = inventorySourceData.source_project;
-                $scope.project_name = inventorySourceData.summary_fields.source_project.name;
+        $scope.envParseType = 'yaml';
+
+        GetSourceTypeOptions({
+            scope: $scope,
+            variable: 'source_type_options'
+        });
+        GetChoices({
+            scope: $scope,
+            field: 'source_regions',
+            variable: 'rax_regions',
+            choice_name: 'rax_region_choices',
+            options: inventorySourcesOptions
+        });
+        GetChoices({
+            scope: $scope,
+            field: 'source_regions',
+            variable: 'ec2_regions',
+            choice_name: 'ec2_region_choices',
+            options: inventorySourcesOptions
+        });
+        GetChoices({
+            scope: $scope,
+            field: 'source_regions',
+            variable: 'gce_regions',
+            choice_name: 'gce_region_choices',
+            options: inventorySourcesOptions
+        });
+        GetChoices({
+            scope: $scope,
+            field: 'source_regions',
+            variable: 'azure_regions',
+            choice_name: 'azure_rm_region_choices',
+            options: inventorySourcesOptions
+        });
+        GetChoices({
+            scope: $scope,
+            field: 'group_by',
+            variable: 'ec2_group_by',
+            choice_name: 'ec2_group_by_choices',
+            options: inventorySourcesOptions
+        });
+
+        var source = $scope.source === 'azure_rm' ? 'azure' : $scope.source;
+        var regions = inventorySourceData.source_regions.split(',');
+        // azure_rm regions choices are keyed as "azure" in an OPTIONS request to the inventory_sources endpoint
+        $scope.source_region_choices = $scope[source + '_regions'];
+
+        // the API stores azure regions as all-lowercase strings - but the azure regions received from OPTIONS are Snake_Cased
+        if (source === 'azure') {
+            $scope.source_regions = _.map(regions, (region) => _.find($scope[source + '_regions'], (o) => o.value.toLowerCase() === region));
+        }
+        // all other regions are 1-1
+        else {
+            $scope.source_regions = _.map(regions, (region) => _.find($scope[source + '_regions'], (o) => o.value === region));
+        }
+        initRegionSelect();
+
+        GetChoices({
+            scope: $scope,
+            field: 'verbosity',
+            variable: 'verbosity_options',
+            options: inventorySourcesOptions
+        });
+
+        var i;
+        for (i = 0; i < $scope.verbosity_options.length; i++) {
+            if ($scope.verbosity_options[i].value === $scope.verbosity) {
+                $scope.verbosity = $scope.verbosity_options[i];
+            }
+        }
+
+        initVerbositySelect();
+
+        $scope.$watch('verbosity', initVerbositySelect);
+
+        // Register a watcher on project_name
+        if ($scope.getInventoryFilesUnregister) {
+            $scope.getInventoryFilesUnregister();
+        }
+        $scope.getInventoryFilesUnregister = $scope.$watch('project', function (newValue, oldValue) {
+            if (newValue !== oldValue) {
                 updateSCMProject();
             }
-
-            // display custom inventory_script name
-            if (inventorySourceData.source === 'custom' && inventorySourceData.summary_fields.source_script) {
-                $scope.inventory_script_name = inventorySourceData.summary_fields.source_script.name;
-            }
-            $scope = angular.extend($scope, inventorySourceData);
-
-            $scope.$watch('summary_fields.user_capabilities.edit', function(val) {
-                $scope.canAdd = val;
-            });
-
-            $scope.$on('sourceTypeOptionsReady', function() {
-                initSourceSelect();
-            });
-
-            $scope.envParseType = 'yaml';
-
-            initSources();
-
-            GetChoices({
-                scope: $scope,
-                field: 'verbosity',
-                variable: 'verbosity_options',
-                options: inventorySourcesOptions
-            });
-
-            var i;
-            for (i = 0; i < $scope.verbosity_options.length; i++) {
-                if ($scope.verbosity_options[i].value === $scope.verbosity) {
-                    $scope.verbosity = $scope.verbosity_options[i];
-                }
-            }
-
-            initVerbositySelect();
-
-            $scope.$watch('verbosity', initVerbositySelect);
-
-            // Register a watcher on project_name
-            if ($scope.getInventoryFilesUnregister) {
-                $scope.getInventoryFilesUnregister();
-            }
-            $scope.getInventoryFilesUnregister = $scope.$watch('project', function (newValue, oldValue) {
-                if (newValue !== oldValue) {
-                    updateSCMProject();
-                }
-            });
-        }
+        });
 
         function initVerbositySelect(){
             CreateSelect2({
@@ -138,110 +222,12 @@ export default ['$state', '$stateParams', '$scope', 'ParseVariableString',
             }
         }
 
-        function initSourceSelect() {
-            $scope.source = _.find($scope.source_type_options, { value: inventorySourceData.source });
-            var source = $scope.source && $scope.source.value ? $scope.source.value : null;
-            $scope.cloudCredentialRequired = source !== '' && source !== 'scm' && source !== 'custom' && source !== 'ec2' ? true : false;
-            CreateSelect2({
-                element: '#inventory_source_source',
-                multiple: false
-            });
-
-            if (source === 'ec2' || source === 'custom' ||
-                source === 'vmware' || source === 'openstack' ||
-                source === 'scm' || source === 'cloudforms'  ||
-                source === 'satellite6') {
-
-                var varName;
-                if (source === 'scm') {
-                    varName = 'custom_variables';
-                } else {
-                    varName = source + '_variables';
-                }
-
-                $scope[varName] = ParseVariableString(inventorySourceData
-                    .source_vars);
-
-                ParseTypeChange({
-                    scope: $scope,
-                    field_id: varName,
-                    variable: varName,
-                    parse_variable: 'envParseType',
-                });
-            }
-        }
-
-        function initRegionData() {
-            var source = $scope.source === 'azure_rm' ? 'azure' : $scope.source;
-            var regions = inventorySourceData.source_regions.split(',');
-            // azure_rm regions choices are keyed as "azure" in an OPTIONS request to the inventory_sources endpoint
-            $scope.source_region_choices = $scope[source + '_regions'];
-
-            // the API stores azure regions as all-lowercase strings - but the azure regions received from OPTIONS are Snake_Cased
-            if (source === 'azure') {
-                $scope.source_regions = _.map(regions, (region) => _.find($scope[source + '_regions'], (o) => o.value.toLowerCase() === region));
-            }
-            // all other regions are 1-1
-            else {
-                $scope.source_regions = _.map(regions, (region) => _.find($scope[source + '_regions'], (o) => o.value === region));
-            }
-            initRegionSelect();
-        }
-
-        function initSources() {
-            GetSourceTypeOptions({
-                scope: $scope,
-                variable: 'source_type_options'
-            });
-            GetChoices({
-                scope: $scope,
-                field: 'source_regions',
-                variable: 'rax_regions',
-                choice_name: 'rax_region_choices',
-                options: inventorySourcesOptions
-            });
-            GetChoices({
-                scope: $scope,
-                field: 'source_regions',
-                variable: 'ec2_regions',
-                choice_name: 'ec2_region_choices',
-                options: inventorySourcesOptions
-            });
-            GetChoices({
-                scope: $scope,
-                field: 'source_regions',
-                variable: 'gce_regions',
-                choice_name: 'gce_region_choices',
-                options: inventorySourcesOptions
-            });
-            GetChoices({
-                scope: $scope,
-                field: 'source_regions',
-                variable: 'azure_regions',
-                choice_name: 'azure_rm_region_choices',
-                options: inventorySourcesOptions
-            });
-            GetChoices({
-                scope: $scope,
-                field: 'group_by',
-                variable: 'ec2_group_by',
-                choice_name: 'ec2_group_by_choices',
-                options: inventorySourcesOptions
-            });
-
-            initRegionData();
-        }
-
         function initRegionSelect() {
             CreateSelect2({
                 element: '#inventory_source_source_regions',
                 multiple: true
             });
 
-            initGroupBySelect();
-        }
-
-        function initGroupBySelect(){
             let add_new = false;
             if( _.get($scope, 'source') === 'ec2' || _.get($scope.source, 'value') === 'ec2') {
                 $scope.group_by_choices = $scope.ec2_group_by;
@@ -366,9 +352,16 @@ export default ['$state', '$stateParams', '$scope', 'ParseVariableString',
                 params.source = null;
             }
 
-            SourcesService
-              .put(params)
-              .then(() => $state.go('.', null, { reload: true }));
+            inventorySource.request('put', {
+                data: params
+            }).then(() => {
+                $state.go('.', null, { reload: true });
+            }).catch(({ data, status, config }) => {
+                ProcessErrors($scope, data, status, null, {
+                    hdr: 'Error!',
+                    msg: InventoryHostsStrings.get('error.CALL', { path: `${config.url}`, status })
+                });
+            });
         };
 
         $scope.sourceChange = function(source) {
@@ -419,7 +412,5 @@ export default ['$state', '$stateParams', '$scope', 'ParseVariableString',
             initRegionSelect();
 
         };
-
-        init();
     }
 ];
diff --git a/awx/ui/client/src/inventories-hosts/inventories/related/sources/edit/sources-edit.route.js b/awx/ui/client/src/inventories-hosts/inventories/related/sources/edit/sources-edit.route.js
index c73c7840b4..2402b9fb08 100644
--- a/awx/ui/client/src/inventories-hosts/inventories/related/sources/edit/sources-edit.route.js
+++ b/awx/ui/client/src/inventories-hosts/inventories/related/sources/edit/sources-edit.route.js
@@ -20,8 +20,8 @@ export default {
         }
     },
     resolve: {
-        inventorySourceData: ['$stateParams', 'SourcesService', function($stateParams, SourcesService) {
-            return SourcesService.get({id: $stateParams.inventory_source_id }).then(response => response.data.results[0]);
+        inventorySource: ['InventorySourceModel', '$stateParams', (InventorySource, $stateParams) => {
+            return new InventorySource('get', $stateParams.inventory_source_id);
         }],
         inventorySourcesOptions: ['InventoriesService', '$stateParams', function(InventoriesService, $stateParams) {
             return InventoriesService.inventorySourcesOptions($stateParams.inventory_id)